Compositions and methods of use of dihalogenated alkane amides



United States Patent 3,332,845 COMPOSITIQNS AND METHODS OF USE 0F DIHALOGENATED ALKANE AMIDES Alexander R. Surrey, Albany, N.Y., assignor to Sterling Drug Inc., New York, N.Y., a corporation of Delaware N0 Drawing. Original application Oct. 8, 1959, Ser. No.

845,102, now Patent No. 3,143,566, dated Aug. 4, 1964.

Divided and this application Apr. 13, 1964, Ser. No.

6 Claims. (Cl. 167-65) This invention relates to compositions of matter of the class of N,N'-di-[halogenated-(lower-alkanoyl)]diamine derivatives, to intermediates and processes for their preparation, to their use, and to compositions for using them.

This application is a division of my copending application Ser. No. 845,102, filed Oct. 8, 1959, now US. Patent No. 3,143,566, which in turn is a continuation-inpart of my copending application Ser. No. 587,937, filed May 29, 1956, now abandoned, which claims certain embodiments of the instant invention, namely N,N'-bis[halogenated (lower alkanoyl)] N,N disubstituted 1, 4 (and 1,3) bis(aminomethyl)benzene derivatives, as well as intermediates and processes for forming these compounds and discloses compositions for the use of these compounds. Application Ser. No. 845,102 discloses and claims in addition to said subject matter of application Ser. No. 587,937 other related N,N-di-[halogenated- (lower-alkanoyl)]-diamines, processes for their preparation and use and compositions comprising all of the above said N,N-di- [halogenated-( lower-alkanoyl) ]-diamines.

An aspect of my invention are the N,N-di-[halogenated (lower alkanoyl)] N,N disubstituted diamines having the general structural formula I where Y is lower-alkylene; m is a number from 0 to 6 inclusive and C l-I represents lower-alkylene when m is from 1 to 6; Ar is a lower-divalent-aromatic radical; Ac and Ac each are halogenated-(lower-alkanoyl); and, Z and Z are members selected from the group consisting of hydrocarbon radicals of the formula R, hydroxyalkyl radicals of the formula -Y OH, hydrocarbonoxyalkyl radicals of the formula Y -OR, acyloxyalkyl radicalsof the formula -Y OAc', cyanoalkyl radicals of the formula -Y CN and carbamylalkyl radicals of the formula Y -CONH where Y is alkylene having from two to six carbon atoms and having its two free valence bonds on different carbon atoms, R is hydrocarbon radical having from one to eight carbon atoms and Ac is carboxylic-acyl having from one to eight carbon atoms.

Another aspect of my invention are the N,N-di-[halogenated (lower alkanoyl)] N,N' disubstituted diamines having the general structural formula II where Y is selected from the group consisting of CXHZX n 2n2 y 2y 3,332,845 Patented July 25, I967 CEC, where x and each are numbers from 0 to 6 inclusive and n is an integer from 3 to 8 inclusive, C H and C H each representing lower-alkylene when x and y each are from 1 to 6 and C H representing cycloalkylene; AC3 and Ac, each are halogenated-(lower alkanoyl) having from two to three halogen atoms; and Z and Z are members selected from the group consisting of hydrocarbon radicals of the formula R, hydroxyalkyl radicals of the formula Y OH, hydrocarbonoxyalkyl radicals of the formula -Y -OR, acyloxyalkyl radicals of the formula Y -OAc', cyanoalkyl radicals of the formula -Y -CN and carbamylalkyl radicals of the formula -Y CONH where Y is alkylene having from two to siX carbon atoms and having its two free valence bonds on different carbon atoms, R is a hydrocarbon radical having from one to eight carbon atoms and Ac is carboxylic-acyl having from one to eight carbon atoms.

The compounds represented by Formulas I and II have been tested by standard chemotherapeutic evaluation procedures in vivo in hamsters and also in vitro and found to possess amebacidal activity. Many of them have been tested by standard endocrinological procedures in rats and found to possess gonadal hormone potentiating effects and antispermatogenic properties.

In the above Formula I Y represents lower-alkylene and, also, when m is an integer from 1 to 6 inclusive C H represents lower-alkylene each as illustrated by CII CH CH --CH CH CH C 1H(CH -C' H(CzH -0Ha3HoH 3 z' -a 3 2 2-w 2 4,

(CH and the like. When m is 0, i.e., zero, in Formula I, the nitrogen atom substituted by Z and Ac is linked directly to a ring-carbon atom of the lower-divalent-aromatic radical Ar.

The lower-divalent-aromatic radical as represented in Formula I by Ar has from one to three aromatic rings each having five or six ring-atoms which are carbocyclic or heterocyclic, as illustrated by divalent radicals derived from benzene (e.g., 1,3-phenylene, 2-chloro-1,4-phenylone), naphthalene, anthracene, pyridine, quinoline, isoquinoline, acridine, pyrimidine, furan, thiazole, thiophene, and the like. The two connecting linkages of Ar are each bound to any available carbon atom of the aromatic rings; and the aromatic rings can be further substituted with substituents, for example, halo, lower-alkoxy, lower alkyl, lower alkylsulfinyl, lower alkylsulfonyl, nitro, hydroxy, trihalomethyl, di-(lower-alkyl)amino, and other related substituents which are unreactive or selectively unreactive under the reaction conditions used for the preparation of the intermediates and final products. Furthermore, said substituents can be in any of the available positions of the Ar nucleus, and where more than one substituent, they can be the same or different and can be in any of the various position combinations relative to each other. The halo substituents can be chloro, bromo, iodo or fluoro. The lower-alkoxy, lower-alkyl, lower-alkylmercapto, lower-alkylsulfinyl, lower-alkylsulfonyl substituents and the lower-alkyl radicals of said di- (lower-alkyl)amino substituent, have preferably from one to six carbon atoms, as illustrated by methoxy, ethoxy, methylenedioxy, ethylenedioxy, n-propoxy, isopropoxy, nbutoxy, isobutoxy, 2-butoxy, n-pentoxy, n-hexoxy, and the like, when lower-alkoxy; methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, Z-butyl, n-pentyl, n-hexyl, and the like, when lower-alkyl; methylmercapto, ethylmercapto, isobutylmercapto, n-hexylmercapto, and the like, when lower-alkylmercapto; methylsulfinyl, n-propylsulfinyl, isopentylsulfinyl, and the like, when lower-alkyl- 3 sulfinyl; methylsulfonyl, isopropylsulfonyl, n-bntylsulfonyl, and the like, when lower-alkylsulfonyl; and, dimethyla-mino, ethyl-methylarnino, di-n-butylamino, di-nhexylamino, and the like, when di-(lower-alkyDamino In the above Formula I the halogenated-(lower-alkanoyl) radicals designated as Ac and A can be the same or different and each can have preferably from one to four carbon atoms and from one to three halogen atoms, as illustrated by chloroformyl(chloromethanoyl), chloroethanoyl), romoacetyl, iodacetyl, fluoroacetyl, dichloroacetyl, dibromoacetyl, diiodoacetyl, difluoroacetyl, bromochloroacetyl, chlorofluoroacetyl, trichloroacetyl, tribromoacetyl, bromodichloroacetyl, chlorodibromoacetyl, dichlorofl'uoroacetyl, chloroiodoacetyl, 2-chloropropanoyl( alpha-chloropropionyl), 3-chloropropanoyl (betachloropropionyl), 2-bromopropan0yl, 2,2-dichloropr0- panoyl, 2,2-diiodopropanoyl, 2,2-dibromopropanoyl, 2,2- difluoropropanoyl, 2,3 dichloropropanoyl, 2-bromo-3- chloropropanoyl, 2,2,3-trichloropropanoyl, 2-chlorobutanoyl (alpha-chlorobutyryl), 3-chlorobutanoyl, 4-chlorobutanoyl, 2,2-dichlorobutanoyl, 2,3-dibromobutanoyl, 2,2-di-bromobutanoyl, 2,3,4-trichlorobutanoyl, 2,2,3-tribromobutanoyl, and the like.

The hydrocarbon radical R in each of Formulas I and II has from one to eight carbon atoms, and is, for instance, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, phenyl, alkylated-phenyl, benzyl or phenethyl, as further illustrated by methyl, ethyl, n-propyl, isopropyl, 2- butyl, isoamyl, n-hexyl, and the like, when alkyl; ethenyl (vinyl), 2-propenyl, 3-butenyl, Z-hexenyl, and the like, when alkenyl; 2-propynyl(propargyl), S-heXynyl, and the like, when al'kynyl; cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclooctyl, and the like, when cyclohexyl; cyclopropylmethyl, cyclopropylethyl, cyclopentylmethyl, cyclohexylmethyl, cyclohexylethyl, and the like, when cycloalkylalkyl; 2-methylphenyl, 4-methylphenyl, 2,4,-dimethylphenyl, 3-ethylphenyl, and the like, when alkylated-phenyl.

The alkylene radical Y in each of Formulas I and II has from two to six carbon atoms and has its two free valence bonds (or connecting linkages) on different car bon atoms, as illustrated by -CH CH -CH (CH CH C (CH CH CI-I C H CH CI-I CH CH The carboXylic-acyl group Ac in each of Formulas I and H has from one to eight carbon atoms, and is, for instance, alkanoyl, haloalkanoyl, dihaloalkanoyl, trihaloalkanoyl, carboxyalkanoyl, di-(lower-alkyl)aminoalkanoyl, benzoyl, alkoxybenzoyl, carboxybenzoyl, carbalkoxybenzoyl, halobenzoyl, dihalobenzoyl, trihalobenzoyl, as illustrated by formyl, acetyl (ethanoyl), n-butanoyl, 3- methyl-n-butanoyl, n-hexanoyl, chloroacetyl, bromoace, tyl, 3-iodopropanoyl, 2-fluorobutanoyl, dichloroacetyl, 2, 2 dibr-omopropanoyl, 2 chloro 3-bromobutanoyl, tribromoacetyl, 2,2,3-trichloropropanoyl, 2,3,4-trichlorobutanoyl, 2,2-dibromo-6-chlorohexanoyl, carboxyethanoyl, 3-carboXypropanoyl, Z-earboXypropanoyl, 6-carboxyhexanoyl, diethylaminoacetyl, Z-dimethylaminopropanoyl, 4- diethylaminobutanoyl, 4-ethoxybenzoyl, Z-methoxyben- Zoyl, 2-carboxylbenzoyl, 4-carbethoxybenzoyl, 4-chlorobenzoyl, 3,4-dibromobenzoyl, 2,4,6-trichlorobenzoyl, and the like.

In the above Formula II when x and y are each integers from 1 to 6 inclusive C H and C H each represent lower-alkylene, as illustrated above for Y and C H each of Formula I.

In the above Formula II the cycloalkylene radical represented by C I-l where n is an integer from 3 to 8 inclusive is cyclic divalent radical having its two free valence bonds on dilfe-rent ring-carbon atoms, as illustrated by 1,2-cyclopropylene, 1,3-cyclobutylene, 1,3-cyclopentylene, 1,4-cyclohexylene, 1,3-cyclohexylene, 1,4-cycloheptylene, 1,5-cyclooctylene, and the like.

In the Formula II the alkylene radical Y when uninterrupted as designated above has from two to sixteen carbon atoms and can be straight-chained or branched, as illustrated by CH CH CH(CH)CH the like.

Also, as designated above, Y in Formula II comprehends the above-illustrated alkylene radicals which can be interrupted by the connecting linkages O, S, SO (i.e., sulfinyl), S0 (i.e., sulfonyl), NH, N(lower-alkyl), N (lower-alkenyl), N(lower-alkynyl), N[halogenated-(lower-alkanoyD], CH=CH ond CEC where lower-alkyl has preferably from one to about six carbon atoms, loweralkenyl and lower-alkynyl each have preferably from three to about six carbon atoms and halogenated-(loweralkanoyl) are radicals as illustrated above for A0 and Ac of Formula I, said interrupted alkylene radicals being illustrated by In the above Formula II the halogenated-(lower-alkanoyl) radicals designated as A0 and A0 can be the same or diflerent and each has more than one halogen atom, preferably from two to three, and each can have preferably from two to four carbon atoms, as illustrated by dichloroacetyl, dibromoacetyl, diiodoacetyl, difluroacetyl, bromochloroacetyl, chlorofiuoroacetyl, trichloroacetyl, tribromoacetyl, bromodichloroacetyl, chlorodibromoacetyl, dichlorofluo-roacetyl, chloroiodoacetyl, 2,2-dichloropropanoyl (alpha, alpha-dichloropropionyl), 2,2-diiodopropanoyl, 2,2-dibromopropanoyl, 2,2.-difluoropropanoyl, 2,3-dichloropropanoyl, 2-bromo-3-chloropropanoyl, 2,2,3- trichloropropanoyl, 2,2-dichlorob-utan0yl, 2,3-dibromobutanoyl, 2,2-dibromobutanoyl, 2,3,4-trichlorobutanoyl, 2, 2,3-tribromobutanoyl, and the like.

Preferred embodiments because of their high amebacidal activity, low toxicity and commercial practicability due to availability of intermediates are N,N,N,Ntetrasubstituted-l,4( or 1,3)-bis (aminomethyl)benzenes having the Formula III III where Z and Z are Y O-R,

Q are each any of the substitnents given hereinabove for Ar of Formula I but preferably H, halo, lower-alkoxy or lower-alkyl, and where Ac Ac Y R and Ac have the meanings given hereinabove for Formula I. Some of these embodiments, in particular those where Z and Z are lower-alkyl and Ac and Ac are dichloroacetyl, are also useful because of their gonadal hormone potentiating effects and antispermatogenic properties.

Also preferred because of their high amebacidal activity, low toxicity and commercial practicability due to availability of intermediates are the N,N,N,N tetrasubstituted-alkanediamines having the above Formula II Where Y is alkylene having from two to sixteen carbon atoms, Ac and Ac, are each halogenated-(lower-alkanoyl) having preferably from two to three carbon atoms, and Z and Z are preferably each R or Y -O-R, wherein R and Y are defined as above for Formula II. Some of these compounds, especially those where A and Ac, are each dichloroacetyl, are also preferred embodiments because of their useful gonadal hormone potentiating effects and antispermatogenic properties.

Also preferred because of their high amebacidal activity are the N,N,N',N' tetrasubstituted bis(aminomethyl)cycloalkanes having the Formula IV (alkyl) (al yl) NC 2( Hal-2) GET-N where alkyl in each instance has from one to eight carbon atoms, Ac and A0 are each halogenated-(lower-alkanoyl) having preferably from two to three halogen atoms, n is an integer from 3 to 8 inclusive and C H represents cycloalkylene as defined and illustrated above for Formula II.

Another preferred aspect of my invention are the novel N,N'-bis (dichloroacetyl)alkanediamine embodiments having the Formula V where Y is alkylene having from seven'to nine carbon atoms and preferably having its two connecting linkages on carbon atoms which are separated by a chain of at least five other carbon atoms. These embodiments are preferred because of their high degree of activity in terms of gonadal hormone potentiating efiects and antispcrmatogenic properties.

Another aspect of my invention are the phenylendiamine derivatives having the Formula VI I where Ar; is a divalent-aromatic radical of the benzene series, Ac and Ac; are each halogenated-(lower-alkanoyl) having from two to three halogen atoms, and Z is H or lower-alkyl. These novel compounds have amebacidal activity.

Another aspect of my invention are the novel N,N'-di- [polybrominated-(lower-alkanoyl) ]-alkanediamines having the Formula VII where Y is alkylene having from two to sixteen carbon atoms, and Ac and Ac are each polybrominated-(loweralkanoyl), the latter each preferably having from two to four carbon atoms and from two to three brorno substituents. These novel compounds have amebacidal activity.

The N,N'-di-[halogenated- (lower-alkanoyl) ]-diamines having the above Formula I (or III) where Ac =Ac and where Ac Z Z Ar and C H have the meanings designated above for the compounds of Formula I, are prepared by reacting the di-arnine having the Formula I but where Ac =Ac =H with two molar equivalents of a halogenated-alkanoylating agent derived from an acid of the formula Ac OH. Found particularly useful as halogenated-alkanoylating agents were halogenated-alkanoyl halides having the formula Ac -halogen and lower-alkyl halogenated-alkanoates having the formula Ac -O-(loweralkyl) where Ac has the meaning given above for Formula I and the lower-alkyl portion of the ester is preferably methyl, but, can have from one to six carbon atoms, as illustrated by methyl, ethyl, isopropyl, n-butyl, Z-pentyl, n-hexyl and the like. The halo radical attached to the carbonyl of the acyl halide is preferably chloro; however, other halo radicals, i.e., brorno, iodo and fluoro, also can be used. When a lower-alkyl halogenated-alkanoate is used as the halogenated-alkanoylating agent, the reaction is facilitated by warming the reactants together on a steam bath at about 50 to C. The reaction takes place at room temperature; however, the reaction time is usually longer without application of heat. The lower-alkyl halogenated-alkanoates were particularly useful as the halogenated-alkanoylating agents for the preparation of the compounds of Formula I where Z and Z were each hydroxyalkyl, e.g., Z-hydroxyethyl, and where Z =Z =methyl. When a halogenated-alkanoyl halide is used as the halogenated-alkanoylating agent for the preparation of the compounds of Formula I, the reaction is carried out preferably below room temperature, e.g., between about 0-10 C., and preferably in the presence of an acid-acceptor, e.g., NaOH, to take up the hydrogen halide formed by the reaction. Illustrations of the process of this aspect of my invention are: the preparation of N,N-bis(dichloroacetyl)- N,N'-bis (Z-ethoxyethyl) 1,4 bis(aminomethyl)benzene by reacting N,N' bis(2 ethoxyethyl) 1,4 bis(aminomethyl)benzene with dichloroacetyl chloride; the preparation of N,N' bis(bromoacetyl) N,N' bis( 2-methoxyethyl)-l,3-bis(aminomethyl) 2,6-dimethyl-4-methoxybenzene by reacting N,N'-bis(2-methoxyethyl)-1,3-bis(aminomethyl)-2,6-dimethyl-4-methoxybenzene with bromoacetyl bromide; the preparation of N,N'-bis(2,2-dichloropropanoyl)-N,N-diisopropyl-1,4 bis(aminomethyl)benzene by reacting N,N-diisopropyl-l,4-bis(aminomethyl)- benzene with 2,2-dichloropropanoyl chloride; N,N-bis(dichloroacetyl) N,N' diethyl 1,3 bis (aminomethyl)-2-. methoxy-S-chlorobenzene by reacting N,N'-diethyl-l,3- bis(aminomethyl) 2 methoxy-S-chlorobenzene with dichloroacetyl chloride; the preparation of N,N'-bis(diiodoacetyl) N,N' bis(Z hydroxyethyl) 1,4 bis(aminomethyl)benzene by reacting N,N-bis(2-hydroxyethyl)- 1,4-bis(aminomethyl)benzene with methyl diiodoacetate or diiodoacetyl chloride. In the preparation of a bis(chloroformamide), i.e., where Ac is chloroformyl, the hisamine, preferably as its dihydrochloride, is reacted with phosgene while suspended in a nonpolar solvent, e.g., toluene, as illustrated by the preparation of N,N'-bis (chloroformyl) N,N diethyl-1,4-bis(aminomethyl)-benzene or N,N-bis(chloroformyl)-N,N-diethyl-l,6 hexanediamine by bubbling phosgene into a stirred refluxing suspension of N,N-l-diethyl-1,4-bis(aminomethyl)benzene or N,N-diethyl-1,6-hexanediamine, respectively.

The N,N'-di-[halogenated (lower-alkanoyl)]diamines having the above Formulas II, IV, V, VI, and VII where in each instance the compounds have the same halogenated- (lower alkanoyl) radical attached to each of the two nitrogen atoms of a given diamine, i.e., where for the compounds of Formulas 11, IV and VI A =A and for the compounds of Formula VII A =A are prepared by the same general procedure described above for the preparation of the compounds having Formula I, that is, by reacting the appropriate corresponding diamine, e.g.,

to prepare the compounds of Formula II, with two molar equivalents of the appropriate halogenated-alkanoylating agent derived from an acid of the formula Ac OH for the compounds of Formulas II, IV and VI where Ac =Ac and from dichloroacetic acid, e.g., methyl dichloroacetate or dichloroacetyl chloride, for the compounds of Formula V, and from an acid of the formula Ac -OH for the compounds of Formula VII Where Ac =Ac Illustrations of these preparations are: the preparation N,N'-.bis(2,2,3 trichloropropanoyl) N,N-diethyl-1,6-hexanediamine by reacting N,N'-diethyl 1,6 hexanediamine with 2,2,3 trichloropropanoyl chloride; the preparation of N,N-bis (dichloroacetyl) N.N' bis(3-hydroxypropyl) 1,4-bis (aminomethyl)cyclohexane with ethyl dichloroacetate; the preparation of N,N'-'bis(dichloroacetyl) 1,8 octanediamine by reacting 1,8 octanediamine with dichloroacetyl chloride; the preparation of N,N-bis(trichloroacetyl) N,N-dimethyl 1,4 phenylenediamine by reacting N,N'-dimethyl 1,4 phenylenediarnine with t-richloroacetyl chloride; and the preparation of N,N'-bis(dibromoacetyl) 1,10 decanediamine by reacting 1,10- decanediamine with dibromoacetyl bromide.

The compounds of my invention of Formulas I and II where Z and Z are each Y O-Ac are prepared by reacting one of my compounds of Formula I or II where Z and Z are each -Y OH, hereinabove described, with an acylating agent selected from the group consisting of those having the formula Ac"-halogen or (Ac") O, or formic acid, where Y has the meaning given above for Formula I or II and Ac" is like Ac but excluding formyl, that is, Ac" is a carboXylic acyl group having from two to eight carbon atoms as illustrated above for Ac. When an acyl halogen, Ac-halogen, is used, the halide halogen, i.e., the halo radical attached to carbonyl is preferably chloro; however, other halo radicals, i.e., bromo, iodo and fluoro, also can be used. Illustrations of my invention are: the preparation of N,N- bis(dichloroacetyl) N,N' bis(2-acetoxyethyl) 1,4-bis (aminomethyl)benzene by reacting N,N bis(dichloroacetyl) N,N' bis(2-hydroxyethyl) 1,4 bis(aminomethyl)benzene with acetyl chloride or acetic anhydride; the preparation of N,N' bis(bromoacetyl)-N,N-'bis[2- (n-butanoyl)ethyl] 1,3 bis(aminornethyl) 2,4,6 trimethylbenzene by reacting N,N' bis(bromoacetyl)N- N bis(2-hydroxyethyl) 1,3 bis-(aminomethyl)-2,4, 6-trimethylbenzene with n-butanol chloride or n-butanoic anhydride; and the preparation of N,N'-bis(2,2-dichloropropanoyl) N.N bis(3 formyloxypropyl) 1,3 bis (aminomethyl) 2 ethoxy 5 bromobenzene by react ing N,N bis(2,2-dichloropropanoyl) N,N bis(3-hydroxypropyl) 1,3 bis(aminomethyl-Z-ethoxy-S-bromobenzene with formic acid. When an acyl halide, Ac-halogen, is used as the acylating agent, the reaction is carried out preferably below room temperature, with chilling if necessary. When an acyl anhydride, (Ac) O, is used, the

reaction can be carried out at room temperature or prefably higher, e.g., heating on a steam bath.

The intermediate N,N'-diSubstituted-diamines, i.e., the compounds of formulas like Formulas I, II, and VI but Where Ac =Ac =Ac =Ac =H, are generally known compounds and can be prepared by various generally known methods. For example, in the preparation of the compounds where Z =Z one method is the reaction of the diamine, e.g., H NYNH with two molar equivalents of the halide, Z -halogen, where halogen is any halogen, preferably chloro and bromo; another method is the reaction of the dihalo-cornpound, e.g., halogen-Y-halogen, with two molar equivalents of the amine Z NH and in a third method, for the preparation of the compounds of Formula I where Y and C H are each CH an aromatic-di-aldehyde Ar(CHO) is reacted with two molar equivalents of the amine, Z NH to form the bis-anil, Ar(CH=NZ which is then selectively hydrogenated (usually directly Without isolation) to form the intermediate Ar(CH NHZ The latter method is illustrated in more detail for the preparation of intermediates for the preferred embodiments of Formula III (where Z =Z as follows. Terephthalaldehyde, isophthalaldehyde or their ring substituted analogs are reacted with two molar equivalents of the amine, Z NH The resulting bis-anil of the Formula VIII where Z Q Q Q and Q, are defined as hereinabove for Formula III, is then catalytically reduced with hydrogen directly without isolation of the bis-anil to yield the intermediate N,N'-disubstituted 1,4(or 1,3) bis(aminomethyl)benzene derivative. The formation of the hisanil is carried out preferably by heating the amine,

with the terephthalaldehyde (or isophthalaldehyde) at about 50 to C., usually on a steam bath, and preferably removing the Water as it is formed. This reaction also can be run at room temperature using a longer reaction time. The catalytic hydrogenation of the anil is carried out using pressures of hydrogen of preferably one to three atmospheres although higher pressures can be used if desired. The hydrogenation can be run over a Wide temperature range with about 25 to 60 C. lbeing preferred; the reaction is carried out by starting at room temperature and gradually raising the temperature until the hydrogen uptake starts. Higher temperatures can be used if desired. Catalysts suitable in the hydrogenation step are those usually employed in the reduction of anils to secondary amines, e.g., palladium-on-ch'arcoal, Raney nickel, platinum from its oxide, etc. Illustrative of the preparation of these intermediate N,N-disubstituted-bis (aminomethyDbenzenes is the preparation of N,N'-bis (Z-hydroxyethyl) 1,4 bis(aminomethyl)-benzene by reacting terephthalaldehyde with two molar equivalents of Z-hydroxyethylamine (ethanolamine) and reducing the resulting bis-anil by catalytic hydrogenation. Similarly prepared are: N,N'-bis(2-ethoxyethyl) l,4-bis(aminomethyl)benzene using Z-ethoxyethylamine in place of ethanolamine; N,N'-diisopropyl 1,4 bis(aminomethyl)benzene using isopropylamine; N,N'-.bis(2-methoxyethyl) 1,3- bis(amin'omethyl)benzene using isophthalaldehyde and 2- rnethoxyethylamine; and N,N-bis(2-hydroethyl) 1,4 bis (a'minomethyl) 2,5-diethoxybenzene using 2,5 diethoxyterephthalaldehyde and Z-hydroxyethylamine.

The ring substituted analogs of terephthalaldehyde and isophthalaldehyde bearing alkoxy, alkyl, halo and other substituents are generally old in the art and can be prepared by conventional means. This method can also be used for the preparation of the intermediates of the formula Z NHCH ArCH NHZ where Ar is a lower-divalent-aromatic radical having the other meanings given hereinabove.

The method of preparing the intermediate diamines,

by reacting two m'olar equivalents of the amine Z NH or Z NH with the respective dihalide or (haloger 1)-Y(halogen), is illustrated again for the preferred b1s(aminomethy1)benzene derivatives (Formula X below) as follows. They can be prepared by reacting the corresponding xylylene dihalides (Formula IX), preferably the dichlorides or dibromides, with two molar equivalents of a primary amine of the formula Z NH preferably in the presence of an acid acceptor, e.g., NaOH, Na CO .-This procedure is illustrated structurally as follows:

. Z 1-NH2 (halogen) OHz CHr-(halogen) 7 Z 1-NH-CH CHa-NHZ 1 where the two halomethyl substituents are para or meta to each other, and Z Q Q Q and Q have the meanings given above for Formula III. Illustrative of this procedure is the preparation of N,N'-(2-ethoxyethyl) 1,4- bis(aminomethyl) 2,5 dichlorobenzene by reacting 2, S-dichloro-para-xylylene dichloride [same as l,4-bis(chloromethyl) 2,5 dichlorobenzene] with two molar equivalents of 2-ethoxyethylamine. Alternatively, these intermediate N,N-disubstituted 1,4(or 1,3) bis(aminomethyl)benzenes (X) can be prepared stepwise by first reacting a xylyene dihalide (XI) with excess ammonia and then reacting the resulting bis(aminomethyl)benzene (XII) with two molar equivalents of a halide of the formula Z --(halogen), where halogen is preferably chlorine or 'bromine. This procedure is illustrated structurally as follows:

(halogen) H2 C 111- (halogen) I NH;

HzN C H C H2NH2 XII \I Z 1 (halogen) Illustrative of this procedure is the preparation of N,N'- (Z-hydroxyethyl) 1,4 bis(aminomethyl) 2,5 dimethylbenzene by reacting 2,S-dimethyl-para-xylylene dichloride with excess ammonia as known in the art and reacting the resulting 1,4 bis-(aminomethyl) 2,5-dimethylbenzene with two molar equivalents of 2-hydroxyethyl chloride.

Preparation of the unsymmetrical compounds of Formula I, i.e., where Z and Z are diiferent and/or Ac and Ac are difierent can be accomplished by various methods,

as illustrated structurally as follows for the compounds where Y 'Ar-(C H is l,4-'bis(CH )C H CH CH (halogen) halogenating agent /Z /Z1 JH N (BH N XIII XIV I Z2N 2 e CHgN (III-[ N AC2 H Ac -(halogen) l CH2N\ lH N AC1 A01 XVI XV Thus, in the above illustrative procedure the N Z )N(Ac -4-methylbenzylamine (Formula XIII) is treated with a halogenating agent, e.g., Br SO' Cl N-bromosuccinimide, etc.; the resulting 4- halomethylbenzylamine (Formula XIV) is treated with the primary amine Z NH to yield the (Formula XV); and the latter compound is reacted with the acyl halide, Ac -(halogen), to yield the unsymmetrical compound having Formula XVI. This procedure for the preparation of the unsymmetrical compounds of Formula I is also useful for the preparation of the symmetrical compounds of Formula I where Y -Ar-(C H is 1,2- bis(CH )C H e.g., N,N'-bis(dichloroacetyl-N,N'-diethyl-l,2-bis(aminomethyl)benzene is formed by first reacting N dichloroacetyl-N-ethyl-2-methylbenzylamine with bromine, reacting the corresponding 2-bromomethyl- *benzylamine with ethyl amine to yield N-dichloroacetyl- N,N'-diethyl-bis(l,2-aminomethyl)benzene which is then reacted with dichloroacetyl chloride.

Preparation of the unsymmetrical compounds of Formula II, i.e., where Z and Z are different and/or A-c and Au; are diiferent can be accomplished by various methods, as illustrated by the following procedure: A compound of the formula halogen-Y-OI-I is reacted with Z NH to yield Z -NHYOH, which is then reacted with a halogenated-alkanoylating agent derived from an acide of the formula Ac -OH to form which is next reacted with a halogenating agent to convert the alcohol into the corresponding halide of the formula Z (Ac )NY-halogen. The halide is then reacted Zz-NHz t0 Z1(Ac3)N-Y-NHZ2 is reacted with a halogenated-alkanoylating agent derived from an acid of the formula Ad -OH to form where Z Z Ac A04 and Y have the meanings given above for the compounds of Formula II.

Another aspect of my invention are the novel intermediate N,N-disubstituted-1,4- (or 1,3)-bis(aminomethyl) benzene derivatives having the above Formula X where the two aminomethyl substituents are attached to the 'benzene ring at positions selected from the group consisting of meta and para to each other; Q Q Q and Q; are each members selected from the preferred group consisting of H, halogen and lower alkoxy; and Z is a member selected from the preferred group consisting of hydroxyalkyl radicals of the formula Y OH and hydrocanbonoxyalkyl radicals of the formula where Y is alkylene having from two to six carb n atoms and having its two free valence bonds on different carbon atoms and R is a hydrocarbon radical having from one to eight carbon atoms. These compounds can be prepared by the procedures described above and their preparation is illustrated further in the specific examples that follow.

The chemical structures of my novel N,N'-di-[halogenated(l-ower-alkanonyl)]-diamines of the foregoing formulas and my above described novel intermediate N,N'-bis(hydroxyalkyl and hydrocarbonoxyalkyl) bis (aminomethyl)benzenes are established by the modes of syntheses and corroborated by the correspondence of calculated and found values for the elementary analyses for representative examples.

The following examples will further illustrate specific embodiments of the invention without, however, limiting it thereto.

Example 1 A. N,N bis(hydroxyalkyl) bis(aminomethyl)benzenes.The preparation of these intermediates is illustrated by the following preparation of N,N-bis(2hydroxyethyl)-1,4-bis(aminomethyl)benzene: A mixture of 30 g. of terephthalaldehyde and 27.3 g. of ethanolamine was heated in vacuo on a steam bath for one hour. The resulting solid bis-anil was almost completely dissolved in 300 ml. of ethanol and reduced catalytically with hydrogen in the presence of pall-adium-on-charcoal at 50 C. After removing the catalyst by filtration, the solvent was distilled off. The solid residue was recrystallized from ethanol to give 20 g. of product melting at 127129 C.

Analysis.Calcd. for C H N O N, 12.47. Found: N, 11.95.

Other N,N'-bis (hydroxyalkyl) -bis aminomethyl benzenes that can be prepared following the above procedure using the appropriate phthalaldehyde and alkanolamine are: N,N-bis(3-hydroxypropy1)-1,4-bis(aminomethyl)benzene using 3-hydroxypropylamine and terephthalaldehyde, N,N-bis(2 hydroxypropy) 1,4 bis (aminomethyl)benzene using 2-hydroxypropylamine and terephthalaldehyde, N,N'-bis(4 hydroxybutyl)-1,4-bis (aminomethyl)benzene using 4-hydroxy-butylamine and terephthalaldehyde, N,N-l: i=s(3-hydroxypentyl) -1,3- bis (aminomethyl)benzene using 3 hydroxypenylamine and isophthalaldehyde, N,N' bis(6 hydroxyhexyl)-1,4-bis (aminomethyl)benzene using 6-hydroxyhexylamine and terephthalaldehyde, N,N' bis(2 hydroxyethyl)-1,3-bis (aminomethyl)-2,6-dimethyl-4-methoxybenzene using 2- hydroxyethylamine and 2,6 dimethyl 4 methoxyisophthalaldehyde, N,N'-bis(2-hydroxyethyl)-1,3-bis(aminomethyl)-2-methoxy-5-chlorobenzene using Z-hydroxyethylamine and 2-methoxy-S-chloroisophthalaldehyde, N,N' bis(Z-hydroxyethyl)-1,3-bis(aminomethyl) 4,6- dimethoxy-S-ethylbenzene using Z-hydroxyethylamine and 4,6-dimethoxy--ethylisophthalaldehyde, N,N-bis(2 hydroxyethyl) 1,3 bis(aminomethyl)-2,4,6-trimethylbenzene using Z-hydroxyethylamine and 2,4,6-trimethy1- isophthalaldehyde, N,N' bis(2-hydroxyethyl) 1,3-bis (aminomethyl)-2-ethoxy 5 bromobenzene using 2-hydroxyethylamine and 2-ethoxy-S-bromoisophthalaldehyde, N,N-bis(2-hydroxyethyl) -1,4-bis (aminomethyl)- 2,5-diethoxybenzene using 2-hydroxyethylamine and 2,5- diethoxyterephthalaldehyde, N,N' bis(2-hydroxyethyl)- 1,4-bis(aminomethyl) -2,5-dichlorobenzene using 2-hydroxyethylamine and 2,S-dichloroterephthalaldehyde, N,N-bis(2-hydroxyethyl) 1,4 bis(aminomethyl)-2,3,5- trichlorobenzene using 2 -hydroxyethylamine and 2,3,5- trichloroterephthalaldehyde, N,N-bis(2-hydroxyethyl)-1,

3-bis(aminomethyl)-2,4,6-trichlorobenzene using 2-hydroxyethylarnine and 2,4,6 trichloroisophthalaldehyde, and the like.

B. N,N'-bis[halogenwted (lo'wer-alktmoyl)]-N,N'-bis (hydroxyalkyl) -bis(a1min0methyl) benzenes.-The preparation of these compounds is illustrated by the fol-lowing preparation of N,N-bis(dichloroacetyl)-N,N'-bis-(2-hydroxyethyl)-1,4-bis-(aminomethyl)benzene: A mixture of 5 g. of N,N-bis-(Z-hydroxyethyl)-1,4-bi-s(aminomethyl) benzene and 7.1 g. ofmethyl dichloroacetate was heated at C. for four hours. The solid product was stirred in 40 m1. of 1 N hydrochloric acid, collected and washed with water; the yield was 8 g. After three recrystallizations from isopropyl alcohol, the product melted at 162.9-164.8 C. (corn).

Analysis.Calcd. for C H Cl N O C, 43.08; H, 4.51; CI, 31.79. Found: C, 42.84; H, 4.91; CI, 31.9.

The same product is obtained by reacting, preferably at a lower temperature (0 to 25 C.), N,N-bis(2-hydroxyethyl)-1,4-bis(aminomethyl)benzene with two molar equivalents of dichloroacetyl chloride instead of methyl dichloroacetate.

N,N bis(dichloroacetyl) N,N' bis(2 hydroxyethyl) 1,4 bis(aminomethyl)benzene when administered orally to hamsters infected with Endamoeba criceti was found to have an ED of :0.8 mg./kg./day.

Other representative N,N' bis[halogenated (loweralkanoyl)] N,N' bis(hydroxyalkyl) bis(aminomethyl) benzenes that can be prepared following the above procedure in Example 1B using molar equivalent quantities of the appropriate reactants are the following compounds of Examples 2-25.

Example 2 N,N' bis(dibromoacetyl) N,N (2 hydroxyethyl)- 1,4 bis (aminomethyl)benzene is obtained using N,N'- bis(2 hydroxyethyl) 1,4 bis(aminoethyl)benzene and methyl di'bromoacetate.

Example 3 N,N' bis(diiodoacetyl) N,N' bis(2 hydroxyethyl) 1,4 bis (aminomethyl)benzene is obtained using N,N bis(2 hydroxyethyl) 1,4 bis(aminomethyl) benzene and ethyl diiodoacetate.

Example 4 N,N bis(difluoroacetyl) N,N' bis(2 hydroxyethyl) 1,4 bis(aminomethyl)benzene is obtained using N,N' bis(2 hydroxyethyl) 1,4-bis(aminomethyl)benzene and methyl difluoroacetate.

Example 5 N,N' bis(chloro'bromoacetyl) N,N' bis( 2 hydroxyethyl) 1,4 bis(aminomethyl)benzene is obtained using N,N' bis(2 hydroxyethyl) 1,4 bis(aminomethyl)benzene and n-propyl chloro-bromoacetate.

Example 6 N,N' bis(monochloroacetyl) N,N' bis(2 hydroxyethyl) 1,4 bis(aminomethyl)benzene is obtained using N,N' bis(2 hydroxyethyl) 1,4 bis(aminomethyl)benzene and monochloroacetyl chloride.

Example 7 N,N' bis(2,2 dichloropropropanoyl) N,N' bis- (2 hydroxyethyl) 1,4 bis(aminomethyl)benzene is obtained using N,N bis(2 hydroxyethyl) 1,4 bis (aminomethyl)benzene and 2,2-dichloropropanoyl chloride.

Example 8 N,N bis(2,2 dibromopropanoyl) N,N' bis(2- hydroxyethyl) 1,4 bis(aminomethyl)benzene is 0btained using N,N' bis(2 hydroxyethyl) 1,4 bis (aminomethyl)benzene and methyl 2,2-dibromopropanoate.

N,N' -bis(2,2 dichlorobutanoyl) N,N bis(2- hydroxyethyl) 1,4 bis(aminomethyl)benzene is obtained using N,N' bis(2 hydroxyethyl) 1,4 bis (aminomethyDbenzene and 2,2-dichlorobutanoyl chloride.

Example 11 N,N bis(2,4 dibromobutanoyl) N,N' bis(2- hydroxyethyl) 1,4 bis(aminomethyl)benzene is obtained using N,N' bis(2 hydroxyethyl) 1,4 bis (aminomethyl)benzene and 2,4-dibromobutanoyl bromide.

Example 12 N,N' bis(dichloroacetyl) N,N' bis(3 hydroxypropyl) 1,4 bis(aminomethyl)benzene is obtained using N,N' bis(3 hydroxypropyl) 1,4 bis(aminomethy1)benzene and dichloroacetyl chloride.

Example 13 N,N' bis(dibromoacetyl) N,N' "bis(2 hydroxypropyl) 1,4 bis(aminornethyl)benzene is obtained using N,N' bis(2 hydroxypropyl) 1,4 bis(aminornethyl)benzene and methyl dibromoacetate,

Example 14 N,N' bis(2,2 dichloropropanoyl) N,N' bis(4 hydroxybutyl) 1,4 bis(aminomethyl)benzene is obtained using N,N' bis(4 hydroxybutyl) 1,4 bis (aminomethyl)benzene and 2,2 dichloropropanoyl chloride.

Example 15 I N,N' bis(monoiodoacetyl) N,N' bis(3 hydroxypentyl) 1 ,4 bis(aminornethyl)benzene is obtained using N,N' bis(3 hydroxypentyl) 1,4 bis(aminomethyl) benzene and monoiodoacetyl chloride.

Example 16 N,N' bis(dichloroacetyl) N,N' bis(6 hydroxyhexyl) 1,4 bis(aminomethyl)benzene is obtained using N,N' bis(6 hydroxyhexyl) 1,4 bis(aminomethyl) benzene and dichloroacetyl chloride.-

Example 17 N,N bis(dichloroacetyl N,N bis(2. hydroxyethyl) 1,3 bis(a'minomethyl) 2,6 dimethyl 4 me- N,N' bis(dichloroacetyl) N,N bis(2 hydroxyethyl) 1,3 bis(aminomethyl) 4,6 dimethoxy ethylbenzene is obtained using N,N-bis(2-hydroxyethyl) 1,3 bis(aminomethyl) 4,6 dirnethoxy 5- ethylbenzene and methyl dichloroacetate.

Example 20 N,N bis(dichloroacetyl) N,N' bis(2 hydroxyethyl) 1,3 bis(aminomethyl) 2,4,6 trimethylbenzene is obtained using N,N' bis(2 hydroxyethyl) 1,3-

14 bis(aminomethyl) 2,4,6 trimethylbenzene and methyl dichloroacetate.

Example 21 N,N' bis(di'bromoacetyl) N,N bis(2 hydroxyethyl) 1,3 bis(aminomethyl) 2 ethoxy 5 bromobenzene is obtained using N,N' bis(2 hydroxyethyl)- 1,3 bis(aminomethyl) 2 ethoxy 5 bromobenzene and methyl dibromoacetate.

Extample 22 N,N' bis(dichloroacetyl) N,N' bis(2-hydroxyethyl) 1,4 bis(aminomethyl)-2,5-diethoxybenzene is obtained using N,N bis(2 hydroxyethyl) 1, 4 bis- (arninomethyl)-2,5 diethoxybenzene and ethyl dichloroacetate.

Example 23 N,N-bis(dichloroacetyl) N,N' bis(2 hydroxyethyl) 1,4- bis(aminornethyl) 2,5 dichlorobenzene is obtained using N,N bis(2 hydroxyethyl) 1, 4 bis- (aminomethyl) 2,5 dichlorobenzene and methyl dichloroacetate.

Example 24 N,N' bis(dichloroacetyl) N,N' bis(2 hydroxyethyl) 1,4 bis(aminomethyl) 2,3,5 trichlorobenzene is obtained using N,N-bis(2 hydroXyethyl) 1,3 bis (aminomethyl) 2,3,5 trichlorobenzene and methyl dichloroacetate.

Example 25 N,N' bis(dichloroacetyl) N,N' bis(2 hyd-roxyethyl) 1,3 bis(aminomethyl) 2,4,6 trichlorobenzene is obtained using N,N bis(2 hydroxyethyl) 1,3 bis- (aminornethyl) 2,4,6 trichlorobenzene and methyl dichloroacetate.

Example 26 A. N,N' bis(hydrocarbyl) bis(aminomethyl)benzenes.-The preparation of these intermediates is illustrated by the following preparation of N,N'-diethyl-1,4- bis(aminomethyl)-benzene [or 1,4-bis(ethylamin0methyl)benzene]: Terephthalaldehyde (5.0 g., 0.037 mole) was added to 12 ml. of a 70% aqueous ethylamine solution and allowed to stand one-half hour. To this mixture containing the bis-anil was added 10 ml. of ethanol, 250 mg. of PdCl and 2 g. of charcoal; and the hydrogenation was conducted at 35-40 C. in a Parr apparatus with 83% of the theory of hydrogen being absorbed. After filtration to remove the catalyst, the alcohol and excess ethylamine were evaporated under reduced pressure to yield 1,4-bis(ethylaminomethyl)benzene, which when treated with ethanolic hydrochloric acid and ether yielded 6.0 g. of white crystalline product, 1,4-bis(ethylaminomethyl)benzene as its dihydrochloride, M.P. over 300 C.

Analysis.--Calcd. for C H N 2HCl: Cl, 26.74. Found: 01-, 26.50.

Following the above procedure using other lower alkylamines in place of ethylamine, the following compounds are prepared: 1,4 bis(n propylaminomethyl)benzene using n-propylamine, 1,4 bis(isobutylaminoniethyl)benzene using isobutylamine, 1,4-(n-hexylaminomethyl)benzene using n-hexylamine, 1,4-bis(allylarninornethyl)benzene using allylarnine, 1,4-bis(cyclohexylaminomethyl) benzene using cyclohexylamine, 1,4-bis(cyclopropyl1nethylaminomethyl)benzene using cyclopropylmethylamine, 1,4-bis(phenylaminomethyl)benzene using aniline, 1,4- bis(benzylaminomethyl)benzene using benzylamine, and the like.

Following the above procedure using isophthalaldehyde in place of terephthalaldehyde, 1,3-bis(ethylaminoethyl) benzene is obtained.

Other representative N,N-bis(hydrocarbyl)-bis(amino methyl)benzenes that can be prepared following the above procedure using molar equivalent quantities of the appropriate reactants are: 1,4-bis(ethylaminoethyl)- 2,5-dibromobenzene using 2,5-dibromoterephthalaldehyde 15 and ethylamine, 1,3-bis(isopropylaminomethyl) 2,6-dimethyl-4-methoxybenzene using 2,6-dimethyl-4-methoxyisophthalaldehyde and isopropylamine, l,3-bis(ethyla1ninoethyl)-2-rnethoxy 5 chlorobenzene using Z-methoxy-S- chloroisophthalaldehyde and ethylamine, 1,3-bis(methylaminomethyl)-4,6-dimethoxy-S-ethylbenzene using 4,6-dimethoxy-S-ethylisophthalaldehyde and methylamine, 1,3- bis(isopropylaminome-thyl)-2,4,6-trinrethylbenzene using 2,4,6-trimethylisophthalaldehyde and isopropylarnine, 1,3- bis (ethylaminomethyl)-2-ethoxy-5bromobenzene using 2- ethoxy-S-brornoisophthalaldehyde and ethylamine, 1,4- bis(ethylaminomethyl)-2,5-diethoxybenzene using 2,5- diethoxyterephthalaldehyde and ethylamine, 1,4-bis(isopropylaminomethyl)-2,5-dichlorobenzene using 2,5 dichloroterephthalaldehyde and isopropylamine, 1,4-bis- (ethylaminomethyl)-2,3,5-trichlorobenzene using 2,3,5- trichloroterephthalaldehyde and ethylamine, 1,3-bis(isobutylaminomethyl)-2,4,6-trichlorobenzene using 2,4,6-trichloroisophthalaldehyde and isobutylamine, and the like.

B. N,N-bis[halgenated-(lorwer-alkanoyl)] N,N'-bis- (hydrocarbyl) bis(amin0methyl)benzenes.The preparation of these compounds is illustrated by the following preparation of N,N-bis(monochloroacetyl)-N,N'-diethyl- 1,4-bis(aminomethyl)benzene: A mixture of 7.0 g. of 1,4-bis(ethylarninomethyl)benzene dihydrochloride dissolved in 15 ml. of Water, 45 ml. of 10% aqueous sodium hydroxide, and 50 ml. of ethylene dichloride was stirred while chilling in an ice bath. To the cold mixture was added dropwise over the course of one-half hour 6.6 g. of monochloroacetyl chloride dissolved in 10 m1. of ethylene dichloride. The organic layer was separated and washed first with aqueous sodium hydroxide and then with aqueous hydrochloric acid. The solution was filtered and the solvent evaporated. The resulting oil Was poured into water and chilled to yield the Whtie crystalline product, N,N'-bis(monochloroacetyl)-N,N- diethyl-l,4-bis(aminomethyl)benzene, one recrystallization of which from isopropyl alcohol-n-hexane gave 6.0 g. (66%) of purified product M.P. 100.4103.2 C. (corn).

Amalysis.Calcd. for CmHzzClzNgOgI C, H, 6.42; Cl, 20.54. Found: C, 55.68; H, 5.95; Cl, 20.74.

In the above procedure the intermediate 1,4-bis(ethylaminomethyl)benzene dihydrochloride is first converted by the sodium hydroxide into its free base form which then reacts with the monochloroacetyl chloride. Alternatively, this procedure can be carried out using the bisamine in free base form and a correspondingly smaller quantity of sodium hydroxide.

N,N-bis(monochloroacetyl) N,N diethyl-1,4 bis- (aminomethyl)benzene when administered orally to hamsters infected with Endamoeba criceti was found to have an ED of 3.8:05 mg./kg./day.

Other repersentative N,N bis[halogenated(loweralkanoyl)]-N,N' bis(hydrocarbyl) bis(aminomethyl) benzenes that can be prepared following the above procedure of Example 263 using molar equivalent quantities of the appropriate reactants are the following compounds of Examples 27-46.

Example 27 N,N-bis(monochloroacetyl)-N,N'-di-n-propyl 1,4-bis- (aminomethyl)benzene is obtained using 1,4-bis(n-propylaminomethyl)benzene and monochloroacetyl chloride.

Example 28 N,N-bis(monobromoacetyl)-N,N diisobutyl 1,4-bis- (aminomethyl)benzene is obtained using 1,4-bis(isobutyl aminomethyl)benzene and monobromoacetyl bromide.

Example 29 N,N'-bis(monoiodoacetyl)-N,N'-di n hexyl 1,4-bis- (aminomethyl)benzene is obtained using l,4-bis(n-hexylaminOmethyDbenZene and monoiodoacetyl chloride.

15 Example 30 N,N-bis(2-chloropropanoyl) N,N' diallyl 1,4 bis- (aminomethyl)benzene is obtained using 1,4-bis(allylaminomethyl)benzene and Z-chloropropanoyl chloride.

Example 31 N,N-bis(2-bromobutanoyl)-N,N-bis(cyclohexyl 1,4- bis(aminomethyl)benzene is obtained using 1,4-bis(cy clohexylaminomethyl)benzene and 2-bromobutanoyl bromide.

Example 32 N,N-bis(2,2-dibromopropanoyl) N,N bis(cyclopropylmethyl)-1,4-bis(aminornethyl) benzene is obtained using 1,4-bis(cyclopropylmethylaminomethyl)benzene and 2,2-dibromopropanoyl bromide.

Example 33 N,N-bis(2,3-dichloropropanoyl)-N,N diphenyl 1,4- bis(amino-methyl)benzene is obtained using 1,4-bis(phenylarninomethyl)benzene and 2,3-dichloropropanoyl chloride.

Example 34 N,N'-bis(2,2-dichlorobutanoyl)-N,N'-dibenzyl 1,4-bis- (aminomethyl)bcnzene is obtained using 1,4-bis(benzylaminomethyl)benzene and 2,2-dichlorobutanoyl chloride.

Example 35 N,N-bis(diiodoacetyl) -N,N-diisobutyl-l,4 bis(aminomethyDbenzene using 1,4-bis(isobutyiaminornethyl)benzene and diiodoacetyl chloride.

Example 36 N,N-bis(difluoroacetyl)-N,N'-diethyl 1,4 bis(aminomethyl)benzene is obtained using 1,4bis(ethylaminomethyl)benzene and difluoroacetyl chloride.

Example 37 N,N-bis(dibromoacetyl)-N,N-diethyl-l,4 bis(aminomethyl)-2,5-dibromobenzene is obtained using 1,4-bis- (etl'iylaminomethyl)-2,5-dibromobenzene and dibromoacetyl bromide.

Example 38 N,N-bis( dichloroacetyl)-N,N-diethyl-1,3 bi-s(aminomethyl)-2,6-din1ethyl-4-methoxybenzene is obtained using 1,3-bis(ethylaminomethyl)-2,6-dimethyl 4 methoxybenzene and dichloroacetyl chloride.

Example 39 N,N-bis(dichloroacetyl)-N,N'-diethyl-l,3 bis(aminomethyl)-2-rnethoxy-5-chlorobenzene is obtained using 1,3-

bis(ethylaminomethyl)-2-methoxy 5 chlorobenzene and dichloroacetyl chloride.

Example 41 N,N-bis(dichloroacetyl)-N,N'- diisopropyl 1,3 bis- (aminomethyl)-2,4,6-trimethylbenzene is obtained using 1,3 bis(isopropylaminomethyl) 2,4,6 trimethylbenzene and dichloroacetyl chloride.

Example 42 N,N-bis(dichloroacetyl)-N,N'-diethyl-1,3 bis(aminomethyl)-2-ethoxy-5-bromobenzene is obtained using 1,3-

bis (ethylaminomethyl)-2-ethoxy-5-bromobenzene and dichloroacetyl chloride.

Example 43 N,N-bis(dichloroacetyl)-N,N-diethyl-l,4 bis(aminomethyl)-2,5-diethoxybenzene is obtained using 1,4-bis I7v (ethyl aminomethyl)-2,5-diethoxybenzene and dichloroacetyl chloride.

' Example 44 N,N'-bis(dichloroacetyl)-N,N' diisopropyl 1,4 bis- (aminomethyl)-2,5-dichlorobenzene is obtained using 1,4- bis(isopropylaminomethyl)-2,5-dichlorobenzene and dichloroacetyl chloride. I

Example 45 N,N'-bis(dichloroacetyl)-N,N'-diethyl-1,4 bis(aminomethyl)-2,3,5-trichlorobenzene is obtained using -bis (ethylaminomethyl)-2,3,5-trichlorobenzene and dichloroacetyl chloride. 1

- Example 46 N,N'-bis(dichloroacetyl)-N,N'-diisobutyl-1,3 bis(aminomethyl)-2,4,6-trichlorobenzene is obtained using 13- bis(isobutylaminomethyl) 2, 4, 6 trichlorobenzene and dichloroacetyl chloride.

Example 47 A. N,N'-bis(hydrocarbyloxyalkyl) bis(aminomethyl) benzenes.-The preparation of these intermediates is illustrated by the following preparation of N,N'-bis(Z-ethoxyethyl)-l,4-bis (anuinomethybbenzene: Te-rephthalaldehyde (6.7 g.) was added in small portions with swirling and cooling in an ice bath to 8.9 g. of Z-ethoxyethylamine. The mixture was allowed to stand at room temperature for two hours, about 25 ml. of ethanol was added, and the bis-anil was hydrogenated at 45 C. and 40 pounds pressure of hydrogen using 250 mg. of palladium chloride and 2.0 g. of charcoal. After the theoretical quantity of hydrogen had been used, the catalyst was removed by filtration and the alcohol was removed by distillation in vacuo to yield N,N'-bis(Z-ethoxyethyl)-1,4-bis(aminomethyDbenZene which when treated with ethanolic hydrochloric acid and ether gave 6.5 g. of the crystalline product as its dihy-drochloride, M-P. over 250 C. A sample was recrystallized from ethanol for analysis.

'Analysis.-Calcd. for C H N O .2HCl: Cl-, 20.07. Found: Cl, 19.93.

' Following the above procedure using isophthalaldehyde in place of terephthalaldehyde, the resulting product is N,N'-bis (2-ethoxyethyl) -1,3-bis (aminomethyl) benzene.

Other N,N' bis(hydrocarbyloxyalkyl)-1,4-bis(aminomethyl)=benzene that can be prepared according to the above procedure using the appropriate hydrocarbyloxyalkylamine in place of 2-ethoxyethylamine are:

N,N'-bis(3-isopropoxypropyl)-1,4-bis-(arninomethy1) benzene using 3-isopropoxyp1'opylarnine,

N,N'-bis- (Z-methoxyethyl -1,4-bis(aminomethyl) benzene N,N'-bis Z-phenoxyethyI -l ,4-bis (aminomethyl) benzene using Z-phenoxyethylamine, N,N'-bis(2-benzyloxyethyl)-l,4-b-is(aminomethyl) benzene using 2-benzyloxyethylamine, N,N'-bis[2- (par-a-tolyloxy)ethyl]-1,4bis( aminomethyl)- benzene using 2-(para-tolyloxy)ethylamine, N,N'-bis [2-(2-phenylethoxy)ethyl]-1,4-bis(aminomethyDberizene using 2-(2 phenylethoxy)ethylamine, and the like.

18 Other N,N' bis(hydrocarbyloxyalkyl) bis(a-minomethyl)-benzenes that can be prepared according to the above procedure using molar equivalent quantities of the appropriate reactants are:

N,N'-bis (Z-ethoxyethyl) -1, 3 -bis (aminomet hyl) -2- methoxy-5-chlorobenzene using 2-methoxy-5- chloroisophthalaldehyde and 2-ethoxyethylamine,

N,N'-bis(Z-ethoxyethyl)-1,3-bis (aminomethyl) -4,6-

dimethoxy-Scthylbenzene using 4,6-dimethoxy-5-ethylisophthalaldehyde and 2-ethoxyethylamine,

N,N'-bis (2-ethoxyethyl) 1,3 -bis(=aminomethyl) -2,4,6-trimethylbenzene using 2,4,6-trimethylisophthalaldehyde and -2-ethoxyethylamine,

N,N'-bis (2ethoxyethyl) -1,4-bis(aminomethyl)-2,5-

dichlorobenzene using 2,5-diehloroterephthalaldehyde and 2-ethoxyethylamine,

N,N'-bis- (Z-ethoxyethyl) -1,4-bis (-aminome-thyl) -2,3 ,5 -trichlorobenzene using 2,3,5-trichloroterephthalaldehyde' and 2-ethoxyethylami-ne, 'and. the like.

B. N,N'-bis[hal0genated (lower-alkanoyD] N,N'- bis(hydrocarbyloxyalkyl) bis(aminomethyl) heuzenen- The preparation of these compounds is illustratedby the following preparation of N,N'-bis(dichloroacetyl)-N,N'- bis-(2-ethoxyethyl) 1,4 bis(aminomethyl)benzenes: A mixture of 6.0 g. of N,N'-bis(Z-ethoxyethyl)-1,4-bis (aminomethyDbenzene dihydrochloride dissolved in 15 ml. of water, 30 ml. of 10% sodium hydroxide, and 45 m1. of ethylene dichloride was stirred in a flask placed in an ice bath. To the cold mixture was added dropwise over the course of one-half hour 5.5 g. of dichloroacetyl chloride dissolved in 25 ml. of ethylene dichloride. Stirring was continued for an additional ten minutes; the organic layer was separated and washed first with 5% aqueous sodium hydroxide and then 'with 5% aqueous hydroehl-oric acid and finally with water. Evaporation in vacuo gave a solid which was recrystallized from ethanol to yield 4.5 g. of crystalline product. N,N'-bis(dichloroacetyl)-N,N'-bis(2-ethoxyethyl) 1-,4 bis(aminomethyl) benzene, -M.P. 137.6-l43.9 C. (corn) when recrystallized from ethanol. 7

Analysis.Calcd. for C20H23Cl4N O4Z C, H, 5.62; Cl, 28.23. .Found: C, 47.77; H, 5.68; Cl, 28.19.

As noted in Example 26B, the above procedure can be carried out using the bis-amine in free base form and a correspondingly smaller amount of sodium hydroxide.

N,N'-bis(dichloroacetyl) N,N' bis(2-ethoxyethyl)- 1,4-bis(aminomethyl)benzene when administered orally to hamsters infected with Endamoeba criceti was found to 'have ran ED of l.14i0.10'ang./kg./day. This compound was found to have an approximate, acute oral toxicity (ALD in mice of greater than 8,000 mg./kg. 1

Other representative N,N' {his [halogenated L (loweralkanoyl)]-N,N' bis(hydrocarbyloxyalkyl) bis(amino methyl)benzenes that can be prepared following the above procedure of Example 47B using molar equivalent quantities of the appropriate reactants are the following compounds of Example 48-65.

Example 48 N,N'-bis(dibromoacetyl) -N,N'-bis(2-ethoxyethyl)-1,4- bis-(aminomethyDbenzene is obtained using N,N'-bis(Z- ethoxyethyl) -'1,4-bis aminomethyl) benzene and dibromoacetyl bromide. I

Example 49 ,toxyethyl -1 ,4-bis aminomethyl) benzene, M .P.

2 1 N,N'-bis (dichloro acetyl) -N,N'-bis Z-formyloxyethyl) 1,3-bis (aminomethyl -4,6-dimethoxy-5-ethylbenzene, N,N'-bis (dichloroacetyl) -N,N-bis (2-formyloxyethyl) 1,3-bis (aminomethyl -2,4,6-trimethylbenzene, N,N'-bis (dichloroacetyl) -N,N-bis (2-formyloxyethyl) 1,4-bis aminomethyl) -2,3 ,5 -trichlorobenzene, and the like.

Example 67.N,N'-bis [halogenated- (lower-alkanoyl N ,N '-bis(acyl0xyalkyl -bis(wminomethyl benzenes The preparation of these compounds is illustrated by the following preparation of N,N'-bis(dichloroacetyl)- N,N' bis(2 acetoxyethyl) 1,4 bis(aminomethyl) benzene: A mixture of 2.5 g. of N,N'-bis(dichloroacetyl)- N,N' bis(2 hydroxyethyl) 1,4 bis(aminomethyl) benzene, 1.5 g. of acetic anhydride and 0.45 g. of pyridine was allowed to stand at room temperature for twelve hours. About ml. of water was addedto the reaction mixture and the solid that separated was filtered and recrystallized froin ethyl acetate to give 2.3 g. of white crystalline N,N' bis(dichl oroacetyl) N,N' bis(2 ace- 152.2- 154.4 C. (corr.).

Analysis.-Calcd. 01 C H24Cl4N 2O31 C, H, 4.57; Cl, 26.76. Found: C, 45.26; H, 4.60; Cl, 26.84.

The same product is obtained by reacting N,N'-bis- (dichloroacetyl) N,N' bis(2 hydroxyethyl) 1,4- bis(aminomethyl)benzene with acetyl chloride instead of acetic anhydride.

N,N' bis(dichloroacetyl) N,N' bis(2, acetoxyethyl)l,4-bis(aminomethyl)benzene when administered orally to hamsters infected with Endamoeba crz'ceti was found to clear none out of: 5 and 6 out of 10 of the animals at dose levels of 12.5 and 25 mg./kg./day, respectively.

Using other acyl anhydrides or halides and the corresponding N,N' [halogenated (lower alkanoyl)] N, N bis(hydroxyalkyl) bis(aminomethyDbenzene and following the foregoing procedure, the resulting products are obtained:

N,N'-bis (dibromoacetyl -N,N'-bis (2-n-butanoyloxyethyl)-1,4-bis (aminomethyDbenzene using n-butanoylchloride,

N,N'-bis (diiodoacetyl) -N,N'-bis(3-ch1oroacetoxypropyl)-1,4-bis(aminomethyl)benzene using chloroacetic anhydride or chloroacetyl chloride,

N,N'-bis difluoroacetyl) -N,N'-bis (2-dichloro acetoxypropyl)-1,4-bis(aminomethyl)benzene using dichloroacetyl chloride,

N,N'-bis (bromochloroacetyl -N,N-bis (4-trichloroacetoxybutyl)-1,4-bis(aminoethyl)benzene using trichloroacetyl chloride,

N,N'-bis (monochloroacetyl) -N,N'-bis 3 -acetoxyp entyl) 1,4-bis(aminomethyl)benzene using acetyl chloride, N,N'-bis 2-brornopropanoyl) -N,N'-bis( 6-acetoxyhexyl) 1,4-bis(aminomethyl)benzene using acetic anhydride,

N N'-bis (2,2r-dichloropropanoyl) -N,N'-bis- [2- 3-carboxypropanoyloxy) ethyl] -1,4-bis aminomethyl) benzene using succinic anhydride.

N,N'-bis (2,2-dichlorobutanoyl -N,N-bis (Z-diethylaminoacetoxyethyl)-1,4-bis(aminomethyl)benzene using diethylaminoacetyl chloride,

N,N'-bis(2,2-dichloropropanoyl)-N,Nf-bis(3-benzoyloxypropyl)-1,4-bis(aminomethyl)benzene using benzoyl chloride,

N,N'-bis(2,4-dibromobutanoyl)-N,N'-bis[2-(4-chlorobenzoyloxy) ethyl] 1,4-bis (aminomethyl) benzene using 4-chlorobenzoyl chloride,

bis(aminomethyl)-2-ethoxy-5-bromobenzene using 1 acetic anhydride, N,N'-bis(dichloroacetyl)-N,N'-bis(Z-acetoxyethyl)-1,4-

bis(aminomethyl)-2,5-diethoxybenzene using acetic anhydride, N,N'-bis(dichloroacetyl) -N,Nf-bis(2-acetoxyethyl)-1,41

22 bis(aminomethyl)-2,5-dichlorobenzene using acetic anhydride,

N,N'-bis(dichloroacetyl)-N,N'-bis(2-acetoxyethyl)-1,3-

bis(aminomethyl)-2,4,6-trichlorobenzene using acetic anhydride, and the like.

Example 68 A. N,N' diisopropyl-IA bis(aminomethyl) benzene- This compound was prepared following the procedure described above in Example 26A using 7.0 g. of terephthalaldehyde and 12 g. of isopropylamine. There was thus obtained after hydrogenation of the anil 7 g. of N,N'- diisopropyl 1,4 bis(aminomethyl)benzene dihydrochloride, M.P. over 260 C.

Analysis.-Calcd. for C I N .2HCl: Cl, 24.18. Found: 01-, 23.93.

B. N,N' bis(monochloroacetyl) N,N' di isopropyl- 1,4-bis(aminomethyl)benzene.-This compound was prepared following the procedure described above in Example 26B using 7.0 g. of N,N'-diisopropyl-1,4-bis(arninomethyl)benzene dihydrochlorid'e in a mixture containing 45cc. of 10% aqueous sodium hydroxide solution and 50 cc. of ethylene'dichloride, and 6.5 g. of monochloroacetyl chloride in 15 cc. of ethylene dichloride. There was thus obtained 4.2 g. of product, M.P. 126.1- 128.2 C. (corr.).

Analysis;Calcd. for C 'H Cl N O C, 57.92; H, 7.02; Cl, 19.00. Found: C, 57.86; H,'7.03; Cl, 18.99.

N,N' bis(monochloroacetyl) N,N' diisopropyl- 1,4-bis(aminomethyl)benzene when administered orally to hamsters infected with Endamoeba criceti was found to have an ED of 2510.4 mg./kg./ day. This compound was found to have an approximate acute oral toxicity (ALD in mice of greater than 8,000 ing/kg.

Example 69 A. N,N' I! dimethyl 1,4-bis(amr'nomethyl)benzene.- This compound was prepared following the procedure described in Example 26A using 13.4 g. of terephthalaldehyde and 30 ml. of 60% aqueous methylamine. There was thus obtained after hydrogenation of the anil an 80% yield of the product isolated as its dihydrochloride, M.P. over 260 C.

Analysis.-Ca.lcd. for C10H13N2.2HC1: Cl Found: Cl-, 29.40.

-B. N,N' bis(dichloroacezyl) N,N' dimethyl-L4-bis (aminomethyl)benzene.-'I'his compound was prepared following the procedure described in Example 2613 using 4.5 g. of N,N'-dimethyl-1,4-bis(aminomethyl)benzene dihydrochloride in an aqueous-ethylene dichloride mixture containing 3.3 g. of sodium hydroxide, and 6.1 g. of dichloroacetyl chloride in ethylene dichloride. There was thus obtained 3.7 g. of white crystalline product, M.P. 105.2-107;7 C. (corn).

Analysis.Calcd. for C H ChN 'o zc, 43.54; H, 4.18; Cl, 36.73.-Found: C, 43.98; H, 3.96; Cl, 36.39:

N,N,bis (dichloroacetyl) -N,N'-dimethyl-1,4-bis (aminomethyl) benzene when administered orally to hamsters infected with Endamoeba criceti was found to have an ED of 4.3 :12 mg./kg./day.

Example 70.-N,N' bis(dichloroacetyl) N,N'-diethyl- 1,4-bis(amin0methyl)benzene This compound was prepared following the procedure described in Example 263 using 7 g. of N,N'-diethyl-IA- bis(aminomethyDbenzene dihydrochloride in a waterethylene dichloride mixture containing 4.5 g. of sodium hydroxide, and 8.8 g. of dichloroacetyl chloride in ethyl ene dichloride. There 'wasthus obtained 7 g. of product, M.P. 98.0 1022 C. (corn).

Analysis.CalCd. for C1sH20Cl4N202ZC, H,

v 4.87; Cl, 34.23. Found: C, 46.06; H, 4.66; CI, 34.13.

23' E-D of 1.90:0.26 mg./kg./day. This compound was found to have an approximate acute oral toxicity (ALD in mice of greater than 12,000 mg./kg.

Example 71 .-N,N'bis(dichloroacetyl) -N,N'-diisopr0py 1,4-bis(aminrnefhyl)-benzene This compound was prepared following the procedure described in Example 26B using 3.0 g. of N,N'-diisopropyl-1,4-bis(aminomethyl)benzene dihydrochloride in a mixture containing 20* cc. of ethylene dichloride and 11.2 cc. of aqueous sodium hydroxide solution, and 4.5 g. of dichloroacetyl chloride in 10 cc. of ethylene dichloride. There was thus obtained 1.8 g. of product, M.P. 175.9l80.1 C. (corr.).

Analysis.Calcd. for C H Cl4N O :C, 48.89; H, 5.47; Cl, 32.07. Found: C, 48.60; H, 5.36; Cl, 31. 86.

N,N' bis(dichloroacetyl) N,N diiso-propyl-1,4-bis (aminomethyl)-benzene when administered orally to harm sters infected with Endamoeba criceti was found to clear none out of 5 and 5 out of 8 of the animals at dose levels of 12.5 and 25 mg/kg/day, respectively.

Example 7 2.N,N" bis(dibr0m0acetyl) N,N'-diethyl- 1,4-bis(am'in0methyl)-benzene This preparation was carried out following the procedure described in Example 26B using 5.3 g. of N,N'- diethyl-1,4-bis (aminomethyl)benzene dihydrochloride, 3.2 g. of sodium hydroxide, 50 cc. of water, 50 cc. of ethylene dichloride, and 9.5 g. of dibromoacetyl chloride in 25 cc. of ethylene dichloride. There was thus obtained 9.1 g. of N,N bis(dibromoacetyl) N,N'-diethyl 1,4-bis (aminomethyDbenzene, M.P. 134.8-136.4 C. (corr.).

Anal'ysis.CalCd. for C H Br N O 2Br, N, 4.74. Found: Br, 53.94; N, 4.65.

N,N' bisl(dibromoacetyl)-N,N-diethyl 1,4-bis (aminomethyl) benzene when administered orally to hamsters infected with En'dantoeba crz'ceti was found to have an ED of 0.85:0.20 mg./kg./day. This compound was found to have an approximate acute oral toxicity (ALD in mice of greater than 8,000 mg./kg.

Example 73.-N,N bis(diflu0roacetyl) N,N'-dz'ethyl- 1,4-bis(amin0methyl) benzene This compound was prepared following the procedure described in Example 26B using 9.8 g. of N,N'-diethyl- 1,4 bis*(aminomethyl)benzene dihydrochloride, 6 g. of sodiiim hydroxide, about 50 cc. of water, about 100 cc. of ethylene dichloride, and about 12.5 g. of difluoro acetyl chloride in benzene. There was thus obtained 4.5 g. of N,N' bis (difluoroacetyl) -N,N' diethyl-1,4-bis (aminoethyl)benzene, M.P. 97.2-100.2 C. (corr.).

AnalySlS.-'C3:10d. for C1GHZOF4NQOZIN, O, 9.20. Found: N, 7.92; O, 9.20.

N,N' bis(difluoroacetyl) N,N' diethyl 1,4-bis (amino'methylybenzene when administered orally to hamsters infected with Endamo-e-ba criceti was found to clear one out of 5 and 3 out of 5 of the animals at dose levels of 50 and 100' ing./kg./day, respectively.

Example 74.N,N' bis(dichlorofluoroacetyl) N,N'- diethyl-1,4bis(amin0methyl) benzene This compound was prepared following the procedure described in Example 26B using 10 g. of N,N'-diethyl- 1,4-bis(aminomethyl)benzene dihydrochloride, 6.1 g. of sodium hydroxide, about 50 cc. of water, about 50 cc. of ethylene dichloride, and 12.5 g. of dichlorofiuoroacetyl chloride in about 50 cc. of ethylene dichloride. There was thus obtained 16.4 g. of N,N'-bis(dichlorofiuoro acetyl)-N,N'-diethyl-1,4-bis(aminomethyl)-benzene, M.P. 95.4-100 .4 C. (corr.).

Analysis.-Calcd. for C H Cl F N O :C, 42.72; H, 4.04; N, 6.22. Found: C, 42.51; H, 4.19; N, 6.18.

N,N bis(dichlorofluoroacetyl) N,N' diethyl-1,4- bis(aminomethyDbenzene when administrated orally to hamsters infected with Endamoeba criceti was found to clear 1 out of 5 and 2 out of 4 of the animals at dose levels of 50 and 100 mg./ kg./ day, respectively.

Example .N,N-bis(dichloroacetyl)-N,N '-a'i-n'- propyl-I,4-bis(amin0methyl) benzene This compound was prepared following the procedure described in Example 26B using 10 g. of N,N'-di-n-propyl-1,4-bis(aminomethyDbenzene dihydrochloride, 5.7 g. of sodium hydroxide, about 50 cc. of water, about 50 cc. of ethylene dichloride, and 10.5 g. of dichloroa-cetyl chloride in about 50 cc. of ethylene dichloride. There was thus obtained 11.5 g. of N,N'-bis(dichloroacetyl)-N,N-di-npropyl-1,4-bis-(aminomethyl)benzene, M.P. 81.2-84.0 C. (corr.).

Analysis.Cal-cd. for C H Cl N O Cl, 32.08; N, 6.33. Found: Cl, 31.60; N, 6.30.

N,N' bis(dichloroacetyl) N,N di-n-propyl-1,4-bis (aminoniethyl)benzene when administered orally to hamsters infected with Endamoeba criceti was found to have an AED of 16 mg./k-g./ day.

Example 76.N,N'-bis(dichloroacetyl) -N,N'-diethyl- 1,6-hexanediamine mide using corresponding molar equivalent quantities of the appropriate dibromoalkanes and primary amines (2NH in place of 1,6-dibrornohexane and ethyl-amine, respectively, the compounds of Table A were prepared.

TABLE A ZNH(CHa)nNHZ.2HBr

N 0. Z n M.P., C

1 CH3 6 200-203 2 i-CaH'! 6 229-232 3 I1-C3H1 6 294-298 4 Il-O4H9 6 300 5 (CHzhOH 6 163-166 6 (CH2) :0 C2H5 6 222-225 7 (CHzhO CH3 6 194-197 8 C2115 10 275-276 Dec.

To a stirred mixture containing 10 g. of N,N-diethyl- 1,6-hexanediamine dihydrobromide, 6.0 g. of sodium hydroxide, cc. of Water and 100 cc. of ethylene dichloride kept between 5-10 C., was added dropwise a solution of 10.3 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. The reaction mixture was stir-red at about 5 C. for an additional 30 minutes, the layers were then separated, and the aqueous layer was washed with ethylene dichloride. The combined ethylene dichloride layer and washings were washed successively with water, 1 N HCl, water, aqueous sodium acetate solution and water. The ethylene dichloride solution was then dried over anhydrus sodium sulfate and distilled in vacuo. The residual material was crystallized by dissolving it in isopropyl alcohol and then adding ether. The crystalline product thus obtained was recrystallized from isopropyl alcohol to yield 7. 6 g. of N,Nbis(dichloroacetyl)-N,N-diethyl-1,6-hex-anediamine, M.P. 72.8-74.4 C. (corr.).

Analysis.-Calcd. for C H CI N O Cl, 35.97; N, 7.11. Found: Cl, 35.41; N, 7.07.

N,N' bis(dichloroacetyl)-N,N'-diet-hyl-1,6-hexanedi- 25' amine when administered orally to hamsters infected with Endamoeba criceti was found to clear 3 out of 5 and 5 out of 5 of the animals at dose levels of 3.12 and 6.25 m-g./kg./day, respectively. This compound was found to have an acute oral toxicity (ALD in mice of greater than 16,000 mg./kg.

Example 77.N, N-bis(dichloroacetyl)-N,N'-diethyl 1,3-prpanediamine This preparation was carried out following the procedure described in Example 76 using 5.2 g. of N,N-diethyl- 1,3-pr0panedian'1ine dihydrochloride, 4.4 g. of sodium hydroxide, about 75 cc. ofwater about 75 cc. of ethylene dichloride, and 7.6 g. of dichloroacetyl chloride in about 75 cc. of ethylene dichloride. There was thus obtained 3.2 g. of N,N'bis(dichloroacetyl)-N,N'-diethyl-1,3-propane diamine, B.P. 177-180 C. at 0.005 mm., n =1.5210.

Analysis.-Calod. for C H Cl N O: Cl, 40.20; N, 7.95. Found: Cl, 39.90; N, 7.90.

N,N bis(dichloroacetyl) N,N'-diethyl-l,3-propanejdiamine when administered orally to hamsters infected with En'damoeba criceti was found to clear none out of and 4 out of 5 of the animals at dose levels of 25 and 50 mg./kg./-day, respectively.

The intermediate N,N'-diethy1-1,3-propanediamine dihydrochloride was prepared by the following procedure:

To 130 cc. of 70% aqueous ethylamine solution was added gradually 17.2 g. of methyl acrylate, whereupon an exothermic reaction took place. The reaction mixture was allowed to stand at room temperature overnight; the excess ethylarnine was distilled in vacuo; and the residual oil was distilled in vacuo to yield 25.1 g. of N,N-diethyl- 3-aminopropanamide, B.P. IDS-106 C. at 1 mm., 11 1.4600.

Analysis.--Calcd. for C H N O: N 9.70. Found: N 9.55.

To a stirred suspension containing 8.55 g. of lithium aluminum hydride in 200 cc. of ether was added drop- 'wise a solution containing 14.4 g. of N,N'-diethyl-3-aminopropanamide in 100 cc. of ether, the addition taking about one hour. The reaction mixture was then refluxed with stirring for an additional five hours. The reaction mixture was next treated dropwise with stirring with successive portions of 9 cc. of 20% aqueous sodium hydroxide solution and 27 cc. ofwater; the resulting mixture was filtered; the layers of the filtrate were separated; and the ether layer was dried over anhydrous magnesium sulphate. The dried ether solution was concentrated in vacuo to yield an oil which was dissolved in ethanol and treated with excess ethanolic hydrogen chloride. The mixture was cooled and treated with ether to yield 5.5 g. of N,N' diethyl 1,3 propanediamine dihydrochloride, M.P. 309-310 C. A small sample was recrystallized from ethanol for analysis.

Analysis.Calcd. for C H N .2HCl: Found: Cl, 35.20.

Example 78 N.N' Q bis(dichloroacetyl) N,N'-diethyl-1,4-butanediamine was prepared following the procedure described in Example 76 using 4.3 g. of N,N'-diethyl-1,4-butanediamine dihydrochloride, 3.5 g. of sodium hydroxide, 50 cc. of water, 6.2 g. of dichloroacetyl chloride and a total of 150 cc. of ethylene dichloride. There was thus obtained 5.5 g. of N,N'-bis(dichloroacetyl)-N,N'-diethyl-1,4-butanediamine, M.P. 139.8-l42.0 C. (corn).

Analysis.Calcd. for C H Cl N O- Cl, 38.74; N, 7.65. Found: Cl, 38.50; N, 7.51.

N,N' bis(dichloroacetyl) N,N'-diethyl-1,4-butanediamine when administered orally to hamsters infected with Endamoeba criceti was found to have an ED of 5.6:08 mg./kg./day.

The intermediate N,N'-diethyl-1,4-butanediamine dihydrochloride was prepared by refluxing for about twentyfour hours a stirred mixture containing 13 g. of N,N-diethylsuccinamide, 12.9 g. of lithium aluminum hydride and about 300 cc. of absolute ether. The reaction mixture was then treated successfully with 13 cc. of water, 13 cc. of 20% aqueous sodium hydroxide solution and 39 cc. of water. The mixture was filtered, and the ether layer was separated and concentrated in vacuuo to yield an oil. The oil was dried by azeotropically distilling with benzene and was then dissolved in isopropyl alcohol and treated with excess ethanolic hydrogen chloride followed byaddition of ether to give 4.0 g. of N,N'-diethyl-1,4- butanediamine dihydrochloride, M.P. 300-302 C.

Analysis.Calcd. for C H N QHCI: Cl, 32.70. Found: Cl, 32.80.

' Example 79 N,N bis(dichloroacetyl) N,N'-diethyl-1,5-pentanediamine was prepared following the procedure described in Example 76 using 5 g. of N,N'-diethyl-1,S-pentanediamine dihydrochloride, 3.8 g. of sodium hydroxide, 75 cc. of Water, 6.4 g. of dichloroacetyl chloride and a total of 150 .cc. of ethylene dichloride. There was thus obtained 5.6 .g. of N,N'-bis(dichloroacetyl)-N,N-diethyl-1,5-pentanediamine, M.P. 106.0-107.2 C. (corn), after one recrystallization from isopropyl alcohol.

Analysis.-Calcd. for C H Cl N O Cl, 37.35; N, 7.37. Found: Cl, 37.40; N, 7.23.

N,N' bis(dichloroacetyl) N,N'-diethyl-1,5-pentanediamine when administered orally to hamsters infected with Endamoeba criceti was found to clear 5 out of 5 and 5 out of 5 of the animals at dose levels of 12.5 and 25 mg./kg./day, respectively.

The intermediate N,N'-diethyl-1,5-pent-anediamine dihydrobromide was prepared as follows: A mixture containing 25 g. of diethyl glutarate and about 150 cc. of 70% aqueous ethylamine solution was allowed to stand at room temperature for about forty hours and then distilled in vacuuo. The resulting white solid was treated with 200 cc. of benzene and the resulting mixture dried by azeotropic distillation of some of the benzene. The benzene solution was cooled and the precipitate that separated was collected to yield 25 g. of N,N'-diethyl-1,5-pentanediamide, M.P. 137-139 C. A sample was recrystallized from benzene for analysis.

Analysis.-Calcd. for C H N O N, 15.05. Found: N, 14.16.

, To a stirred mixture of 23 g. of lithium aluminum hydride in about 350 cc. of ether was added in small portions 25 g. of N,N'-diethyl-1,5-pentanediamide; and the resulting mixture stirred under reflux for about five hours. The reaction mixture was worked up according to the procedure described above in Example 78 for the preparation of N,N'-diethyl-1,4-butanediamine dihydrochloride and there was thus obtained 15 g. of N,N-diethyl-l,5-

' pentanediamine dihydrochloride, M.P. 288-290 C. with Example 80 N,N bis(dichloroacetyl) N,N'-dimethyl-1,6-hexane- 'diamine was prepared following the procedure described in Example 76 using 5.7 g. of N,N-dimethyl-l,6-hexanedia'mine dihydrobromide, 3.1 g. of sodium hydroxide, 50 cc. of water, 50 cc. of ethylene dichloride, and 5.6 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained 5.1 g. of N,N-bis(dich1oroacetyl) N,N'-dimethyl-1,6-hexanedi-amine, M.P. 122.2- 123.2 C. (corn), after one recrystallization from isopropyl alcohol.

Analysis.Calcd. for C12H20C14N202: C1, N, 7.65. Found: Cl, 38.60; N, 7.59.

N,N' bis(dichloroacetyl) N,N dimethyl 1,6-hexanediamine when administered orally to hamsters infected with Endamoeba criceti was found to clear 3 out of 5 and 27 out of the animals at dose levels of 5 and mg./kg./ day, respectively.

Example 81 N,N' bis(dibromoacetyl) N,N' diethyl 1,6-hexanediamine was prepared following the procedure described in Example 76 using 6.0 g. of N, N-diethyl-l,6-hexanediamine dihydrobromide, 3.6 g. of sodium hydroxide, 50 cc. of water, '50 cc. of ethylene dichloride, and 8.5 g. of dibromoacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained 6.3 g. of N,N'-bis='(dibromoacetyl)-N,N'-diethyl-1,6-hexanediamine, M.P. 109.4111.6 C. (corr.), after crystallization from isopropyl alcohol.

Analysis.-Calcd. for C H Br N O Br, 55.90; N, 4.90. Found: Br, 55.75; N, 4.79.

N,N' bis(dibromoacetyl) N,N-diethyl-1,6-hexanediamine when administered orally to hamsters infected with Endamoeb'a criceti was found to clear 4 out of 5 and 5 out of 5 of the aminals at dose levels of 3.12 and 6.25 mg. k-g./ day, respectively.

Example 82 N,'N' bis(dichloroacetyl) N,N'-diisopropyl-l,6-hexanediamine was prepared following the procedure described in Example 76 using 5.1 g. of N,N'-diisopropyl- 1,6-hexanediamine dihydrobromide, 2.8 g. of sodium hydroxide, 50 cc. of water, 50 cc. of ethylene dichloride, and 4.1 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained 3.8 g. of N,N'-bis(di chloroacetyl) N,N-diisopropyl-1,6-hexanediamine, M.P. 105.6110.0 C. (corn).

Analysis.Calcd. for C H Cl N O Cl, 33.58; N, 6.64. Found: Cl, 34.00; N, 6.56.

N,N bis (dichloroacetyl)-N,N-diisopropyl-l,6-hexanediamine when administered orally to hamsters infected with Endamoeba criceti was found to clear 3 out of 4 and 5 out of 5 of the animals at dose levels of 6.25 and 12.5 mg./ kg./ day, respectively.

Example 83 N,N bis(dichloroacetyl)-N,N'-di-n-propyl-1,6-hexanediamine was prepared following the procedure described in Example 76 using 5.0 g. of N,N'-di-n-propyl-1,6-hexanediamine dihydrobromide, 2.8 g. of sodium hydroxide, 50 cc. of water, 75 cc. of ethylene dichloride, and 4.1 g. of dichloroacetyl chloride in 25 cc. of ethylene dichloride. There was thus obtained 2.9 g. of N,N'-bis(dichlo' roacetyl)-N,N'-di-n-propyl-1,6-hexanediamine, M.P. 56.0- 58.2 C. (corn), aftertwo recrystallizations from cyclohexane.

Analysis.Calcd. for C H Cl N O Cl, 33.58; N, 6.64. Found: Cl, 33.65; N, 6.62.

N,N' bis (dichloroacetyl)-N,N-di-n-propyl-1,6-hexane diamine when administered orally to hamsters infected with Endamoeba criceti was found to clear 5 out of 5 of the animals at each of the dose levels of 6.25 and 12.5 mg./kg./day, respectively.

Example 84 N,N' bis(dichloroacetyl)-N,N'-di-n-butyl-1,6-hexanediamine was prepared following the procedure described in Example 76 using 7.0 g. of N,N'-di-n-butyl-1,6-hexanediamine dihydrobromide, 3.6 g. of sodium hydroxide, 100 cc. of water, 100 cc. of ethylene dichloride, and 5.3 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained, as a light brown oil, 7.2 g. of N,N bis(dichloroacetyl)-N,N'-di-n-butyl-1,6-hexanediamine, after drying at 2.5 mm. and 40 C. for one hour.

AnalysiS.Calcd. for C1gH32cl4N202: Cl, N, 6.22. Found: Cl, 31.60; N, 6.12.

N,N' bis(dichloroacetyl)-N,N'-di-n-butyl-1,6-hexane diamine when administered orally to hamsters infected with Endamoeba criceti was found to clear 3 out of 5 and 4 out of 5 of the animals at dose levels of 6.25 and 12.5 mg. kg. day, respectively.

Example N,N-bis (dichloroacetyl) -N,N'-bis Z-hydroxyethyl) l ,6- hexanediamine was prepared following the procedure described in Example 76 using 7.9 g. of N,N-bis(2-hydroxyethyl)-1,6-hexanediamine dihydrobromide, 4.4 g. of sodium hydroxide, cc. of water, 100 cc. of ethylene dichloride, and 7.4 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained 3.9 g. of N,N' bis (dichloroacetyl) -N,N-bis(2-hydroxyethyl) -1,6 hexanediamine, M.P. 127.8130.2 C. (corn), after two recrystallizations from isopropyl alcohol.

Analysis.Calcd. for C H Cl N O Cl: 33.27; N, 6.57. Found: Cl, 33.00; N, 6.41.

N,N' bis (dichloroacetyl)-N,N'-bis(2-hydroxyethyl-1,6- hexanediamine when administered orally to hamsters infected with Endamoeba crz'ceti was found to clear 2 out of Example 86 N,N' bis(2 acetoxyethyl)-N,N-bis(dichloroacetyl)- 1,6-hexanediamine was prepared as follows: To 4.0 g. of N,N' bis(dichloroacetyl)-N,N'-bis(2-hydroxyethyl)-1,6- hexanediamine was added 2.5 g. of acetic anhydride and 0.7 g. of pyridine and the resulting mixture was allowed to stand at room temperature overnight. Water was added to the reaction mixture and the viscous white oily precipitate was extracted with ethyl acetate. The extract was dried, evaporated, and the residual oily material was dissolved in isopropyl alcohol. The alcohol solution was treated with decolorizing charcoal, filtered and water was added to the filtrate to yield a solid precipitate, which was recrystallized from isopropyl alcohol and dried at 20 mm. and 50 C. for two hours to yield 2.9 g. of N,N'-' bis(2 acetoxyethyl) N,N-bis(dichloroacetyl)-l,6-hexanediamine, M.P. 64.'266.6 C. (co-rr.).,

Analysis.-Calcd. for C H Cl N O Cl 27.77; N, 5.49. Found: Cl, 27.50; N, 5.51.

N,N' bis(2 acetoxyethyl)-N,N'-bis(dichloroacetyl) 1,6-hexanediamine when administered orally to hamsters infected with Endamoeba criceti was found to clear 4 out of -5 and 5 out of 5 of the animals at dose levels of 25 and 50 mg./kg./day, respectively.

Example 87 N,N bis(dichloroacetyl) N,N-bis(2-ethoxyethyl)- 1,6-hexanediamine was prepared following the procedure described in Example 76 using 7.0 g. of N,N-bis(2-ethoxyethyl)-1,6-he'xanediamine dihydrobromide, 3.4 g. of sodium hydroxide, 100 cc. of water, 100 cc. of ethylene dichloride, and 5.0 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained 6.2 g. of N,N'-bis(dichloroacetyl) N,N' bis(2 ethoxyethyl)-1,6- hexanediamine, M.P. 92.0-93.6 C. (corn).

Analysis.-Calcd for C13H32C14N204I C1, N, 5.81. Found: Cl, 29.30; N, 5.76.

N,N' bis(dichloroacetyl)-N,N'-bis(2-ethoxyethyl)-1,6- hexanediamine when administered orally to hamsters infected with Endamoeba criceti was found to clear 5 out of 5 of the animals at each of the dose levels of 3.12 and 6.25 mg./kg./day, respectively.

Example 88 N,N' bis(dichloroacetyl)-N,N'-bis(Z-methoxyethyl)- 1,6-hexanediamine Was prepared following the procedure described in Example 76 using 8.9 g. of N,N-bis(2- methoxyethyl)-1,6-hexanediamine dihydrobromide, 4.8 g. of sodium hydroxide, 100 cc. of water, 100cc. of ethylene dichloride, and 6.8 g. of dichloroacetyl chloride in 50' cc. of ethylene dichloride. There was thus obtained 7.3 g. of N,N bis(dichloroacetyl) N,N' bis(2-methoxyethyl)- 1,6-'hexanediamine, M.P. '96.6'98.2 C. (co1rr.).

Analysis.Calcd. for C H Cl N O Cl, 31.21; N, 6.16. Found: Cl, 31.50; N, 5.97.

29 N,N' bis(dichloroacetyl) N,N-bis(2-methoxyethyl)- 1,6-hexanediamine when administered orally to hamsters infected with Endamoeba criceti was found to clear 5 out of 5 of the animals at each of the dose levels of 6.25 and 12.5 mg./kg./day, respectively.

Example 89 N,N' diethyl N,N'-'bis(trichloro'acetyl)-1,6-hexanediamine was prepared following the procedure described in Example 76 using 7.0 g. of N,N'-diethyl-1,6-hexanediamine dihydrobromide, 4.4 g. of sodium hydroxide, 100 cc. of water, 100 cc. of ethylene dichloride, and 9.1 g. of trichlor-oacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained, as a yellow viscous oil, 8.2 g. of N,N' diethyl N,N 'bis(trichloroacetyl) 1,6-hexanediamine, n =1.5190, after drying at 5 mm. for one hour at room temperature.

Analysis.-Calcd. for C H Cl -N O Cl, 45.92; N, 6.05. Found: Cl, 45.50; N, 6.0.

N,N diethyl N,N-bis(trichloroacetyl)-l,6-hexanediamine when administered orally to hamsters infected with Endamoeba criceti was found to clear 6 out of 10 l and 5 out of 5 of the animals at dose levels of 6.25 and 12.5 mg./kg./day, respectively.

Example 90 7 temperature.

Analysis.C-alcd. for C H Cl N O Cl, 31.49; N, 6.22. Found: Cl, 31.31; N, 6.14.

N,N bis(dichloroacetyl) N,N-diethyl-1,10-decanediamine when administered orally to hamsters infected with Endamoeba criceti was found to have an ED of 0.70:0.23 mg./kg./day. This compound was found to have an. approximate acute oral toxicity (ALD in mice of greater than 2,000 mg./kg.

, Example 91 N,N' bis(dichloroacetyl) N,N'-diethyl-3-methyl-1,6-

hexanediamine was prepared following the procedure de-' scribed in Example 76 using 9 g. of N,N-diethyl-3- methyl-l,6-hexanediamine dihydrochloride, 2.6 g. of sodium hydroxide, 100 cc. of water, 11.4 g. of dichloroacetyl chloride and a total of 100 cc. of ethylene dichloride. There was thus obtained, as a colorless oil, 7.6 g. of N,N' bis(dichloracetyl) N,N diethyl-3-methyl-L6- hexanediamine, n =1.5102, after drying at about 70 C. and 1 mm. for several minutes.

AnalySis.Calcd. for C15H2C14N2021 N, 6.87. Found: Cl, 33.53; N, 6.65.

N,N bis(dichl-oroacetyl) N,N'-diethyl-3-methyl-1,6- hexanediamine when'administered orally to hamsters infected with Enaarmoeba ,criceti was found .to clear 2 out of 5, 7 out of 10, out of 5 of the animals at dose levels of 12.5, 25 and 50 mg./kg./day, respectively.

The intermediate N,N' -diethyl 3-methyl-l,6-hexaneadded dropwise. The reaction mixture was stirred under reflux overnight. The excess thionyl chloride and most of the benzene was removed by distilling in vacuo the reaction mixture with stirring. The residual oil containing the bis(aci-d chloride) of 1,4-dicarboxy-Z-methylbutane 'Was taken up in benzene, and the benzene removed by distilling in vacuo. The bis(acid chloride) was then diluted with benzene and added dropwise with stirring to a chilled portion of 250 cc. of 70% aqueous ethylamine, \keeping the reaction temperature between about 520 C. The excess ethylamine, the water and the ben zene were removed by distilling in vacuo and the resulting oil was treated with about 300 cc. of benzene and the water was removed azeotropically by distilling some of the benzene. The benzene layer was then decanted and the remaining solid was treated (mice again with benzene as above. The benzene solutions were combined and cooled to yield 4 g. of N,N'-diethyl-3-methyl-1,6-hexanediamide, M.P. 130133.5 C. The above residue left after the three benzene extractions was extracted several times with hot ethyl acetate; the resulting extracts were cooled; and there was obtained an additional 8 g. of the product, M.P. 130-132 C.

To a stirred suspension containing 10 g. of lithium aluminium hydride and 500 cc. of absolute ether was added in small portions a hot solution containing 12 g. of N,N-diethyl-3-methyl-1,6-hexanediamide and the resulting mixture was refluxed with stirring forrabout six hours and then allowed to stand overnight at room temperature. The reaction mixture was then treated successively with 10 cc. of water, 10 cc. of 20% aqueous sodium hydroxide solution and 30 cc. of water. The mixture was filtered and the filtrate was dried over anhydrous magnesium sulphate. The solution was distilled in vacuo to yield an oil which was treated with eth-anolic hydrogen chloride and the resulting mixture cooled to yield 9.0 g. of N,N'- diethyl 3 methyl 1,6-hexanediamine dihydrochloride, M.P. 258-260 C.

Following the above described procedure for the preparation of N,N-diethyl-3-methyl-1,6-hexanediamine dihydrochloride using the corresponding molar equivalent quantities first of the appropriate alkane-dicarboxylic acid and thionyl chloride, next reacting the resulting alkane-bis (carboxylic acid chloride) and ethylamine to form the corresponding N,N'-diethyl-alkanediamide, and then retiming the diamide with lithium aluminium hydride, the compounds of Table B were prepared. The corresponding intermediate N,N'-diethyl-alkanediamides are given in Table C.

TABLE B CzH5NH-(CHz)N-NHC2H5.ZHCI

N0. 11. M.P., C.

* B.P. of base is 116-120 C. at 0.15 mm.

No. 11 M.P., C.

Example 92 100 cc. of water, cc. of ethylene dichloride, and 8.8. g.

of dichloroacetyl chloride in 20 cc. of ethylene dichloride. There was thus obtained, as an amber oil, 5.5 g. of N,N- bis(dichloroacetyl) N, diethyl 1,7 heptanediamine,

31 n =l.5100, after drying at 2.0 mm. at room temperature for about minutes.

A'nalysis.-Calcd. for C H Cl N O Cl, 34.76; N, 6.87. Found: Cl, 34.00; N, 6.64.

Example 93 N,N-bis(dichloroacetyl)-N,N'diethyl 1,8 octanediamine was prepared following the procedure described in Example 76 using 4.5 g. of N,N-diethyl-1,8-octanedi amine dihydrochloride, 2.68 g. sodium hydroxide, 50 cc. of water, 75 cc. of ethylene dichloride, and 4.9 g. of dichloroacetyl chloride in cc. of ethylene dichloride. There was thus obtained, as an amber oil, 4.7 g. of N,N'- bis (dichloroacetyl) N,N' diethyl 1,8 octanediamine, n =1.5090, after drying at 2.5 mm. at room temperature for minutes.

Analysis.Calcd. for C H C1 N O CI, 33.4; N, 6.57. Found: Cl, 33.70; N, 6.34.

N,N-b-is(dichloroacetyl)-N,N diethyl 1,8 octanediamine when administered orally to hamsters infected with Endamoeba criceti was found to clear 4 out of 5 and 5 out of 5 of the animals at dose levels of 12.5 and 25 mg./ kg./ day, respectively.

Example 94 N,N'-bis (dichloroacetyl)-N,N'-diethyl 1,9 nonanediamine was prepared following the procedure described in Example 76 using 16.0 g. of N,N-diethyl-1,9-nonanediamine, 8.0 g. of sodium hydroxide, 50 cc. of water, 50 cc. of ethylene dichloride, and 22 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained, as a dark amber oil, 20.3 g. of N,N-bis('dichloroacetyl)-N,N'-diethyl 1,9 nonanediamine, 21 1.5069, after drying at 1.5 mm. at room temperature for 45 minutes.

Analysis.-Calcd. for C H C1 N O Cl, 32.59; N, 6.44. Found: Cl, 32.40; N, 6.33.

Example 95 N,N-bis(dichloroacetyl)-N,N'-diethyl-1,12 dodecanediamine was prepared following the procedure described in Example 76 using 7.9 g. of N,N-diethyl-1,12-dodecanediamine, 2.7 g. of sodium hydroxide, 150 cc. of water, 9.2 g. of dichloroacetyl chloride and a total of 50 cc. of ethlene dichloride. There was thus obtained, as a yellow oil, 11.5 g. of N,N'-bis(dichloroacetyl)-N,N'-diethyl- 1,12-dodecanediamine, n 1.5021, after dry-ing at 150- 160 C.

Analysis.Calcd. for C H Cl N O Cl, 29.65; N, 5.86. Found: Cl, 29.40; N, 5.82.

N,N bis(dichloroacetyl) N,N 1,12 dodecanediamine when administered orally to hamsters infected with Endamoeba criceti was found to clear 3 out of 5, 3 out of 5 and 5 out of 5 of the animals at dose levels of 3.12, 6.25 and 12.5 mg./ kg./ day, respectively.

Example 96 N,N'-bis (2,2-dichloropropanoyl) N,N' diethyl 1,6- hexanediamine was prepared following the procedure described in Example 76 using 7.5 g. of N,N'-diethyl-1,6- hexanediamine dihydrobromide, 4.4 g. of sodium hydroxide, 50 cc. of water, 50 cc. of ethylene dichloride, and 7.3 g. of 2,2-dich1oropropanoyl chloride in 50 cc. of ethylene dichloride. There was thus obtained, as a pale yellow-oil, 5.6 g. of N,N'-bis(2,2-dichloropropanoyl)- N,N'-diethyl-1,6-hexanediarnine, when dried at 2.0 mm. and 40 C. for two hours.

Analysis.-Calcd. for C H Cl N O Cl, 33.58; N, 6.64. Found: Cl, 33.80; N, 6.68.

Example 97 N,N'-bis(dichloroacetyl) 1,2 ethanediamine was prepared following the procedure described in Example 76 using 3.0 g. of 1,2-ethandiamine (ethylenediamine), 4.4 g. of sodium hydroxide, 55 cc. of water, 15.0 g. of dichloro- 32 acetyl chloride and a total of about 150 cc. of ethylene dichloride. There was thus obtained 8.7 g. of N,N'-bis (dichloroacetyl)-1,2-ethanediamine, M.P. 207.0210.0 C. (corn), when recrystallized from ethanol.

Analysis.Calcd. for C H Cl N O Cl, 50.39; N, 9.92. Found: Cl, 50.30; N, 9.78.

N,N'-'bis(dichloroacetyl)-1,2 ethanediamine when administered orally to hamsters infected with Endamoeba criceti was found to clear none out of 5 and 1 out of 5 of the animals at dose levels of 50 and mg./kg./day, respectively.

Example 98 N,N'-bis(dichloroacetyl)-1,3-propanediamine was prepared following the procedure described in Example 76 using 3.7 g. of 1,3-propanediamine, 6.0 g. of sodium hydroxide, 50 cc. of water, 50 cc. of ethylene dichloride, and 14.7 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained 4.7 g. of N,N'-bis (dichloroacetyl)-1,3-propanediamine, M.P. 135.6-137.4 C. (corr.), after three recrystallizations from isopropyl alcohol.

Analysis.Calcd. for C H Cl N O Cl, 47.90; N, 9.47. Found: Cl, 48.20; N, 9.24.

N,N'-bis(dichloroacetyl)-1,3-propanediamine when administered orally to hamsters infected with Endamoeba criceti was found to clear none out of 5 and 4 out of 5 and 4 out of 5 of animals at dose levels of 25, 50 and 100 mg./kg./ day, respectively.

Example 99 criceti was found to clear none out of 5 and 3 out of 5 of the animals at dose levels of 25 and 50 mg./kg./day, respectively.

Example 100 N,N'-bis(dichloroacetyl)-1,5-pentanediamine was prepared following the procedure described in Example 76 using 3.0 g. of 1,5-pentanediamine, 2.58 g. of sodium hydroxide, 50 cc. of water, 8.3 g. of dichloroacetyl chloride and a total of about cc. of ethylene dichloride. There was thus obtained 4.5 g. of N,N'-bis(dichloroacetyl)-1,5- pentanediamine, M.P. 146.0-148.0 C. (corn), when recrystallized twice from ethanol.

Analysis.Calcd. for C H Cl N O C, 33.27; H, 4.36; C1, 43.70; N, 8.64. Found: C, 33.60; H, 4.47; CI, 43.90; N, 8.61.

Example 101 N,N'-bis(dibromoacetyl)-l,6-hexanediamine was prepared following the procedure described in Example 76 using 2.8 g. of 1,6-hexanediamine (70% in water), 2.1 g. of sodium hydroxide, 50 cc. of water, 50 cc. of ethylene dichloride, and 8.0 g. of dibromoacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained 5.5 g. of N,N-bis (dibromoacetyl)-1,6-hexanediamine, M.P. 161.0- 165.0 C. (corn), when recrystallized from isopropyl alcohol.

Analysis.Calcd. for C H Br N O- Br, 61.97; N, 5.43. Found: Br, 62.30; N, 5.50.

N,N-bis(dibromoacetyl)-1,6-hexanediamine when administered orally to hamsters infected with Endamoeba crz'ceti was found to clear 5 out of 5 of the animals at 33 each of the dose levels of 12.5 and 25 mg./kg./day, respectively.

Example 102 N,N'-bis(tri-chloroacetyl)-1,6-hexanediamine was prepared as follows: To 4.0 g. of 1,6-hexanediamine (72% in water), was added with chilling in an ice bath 8.9 g. of methyl trichloroacetate. The solid that separated was collectcd and recrystallized twice from isopropyl alcohol to yield 3.5 g. of N,N-bis(trichloroacetyl)-1,6-hexanediamine, M.P. 1526-1544 C. (corr.).

Analysis.Calcd. for C H C1 N O Cl, 52.26; N, 6.89. Found: C1, 52.2; N, 6.90.

N,N-bis(trichloroacetyl)-1,6-hexanediamine when administered orally to hamsters infected with Endamoeba criceti was found to clear 2 out of and 3 out of 5 of the animals at dose levels of 12.5 and 25 mg./kg./day, respectively.

Example 103 N,N-bis(di-chloroacetyl)-l,7-heptanediamine was prepared following the procedure described in Example 76 using 3.0 g. of 1,7-heptanediamine, 2.26 g. of sodium hydroxide, 50 cc. of water, 50 cc. of ethylene dichloride, and 7.6 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained 2.7 g. of N,N'-bis(dichloroacetyl)1,7-heptanediamine, M.P. 113.4l15.0 C. (corn), after recrystallization once from chloroform-hexane and once from chloroform.

Analysis.Calcd. for C H C1 N O C1, 40.30; N, 7.96. Found: C1, 4030; N, 7.98.

N,N-bis(dichloroacetyl)1,7-heptanediamine when administered orally to hamsters infected with Endamoeba criceti was found to clear 2 out of 5 and 3 out of 5 of the animals at dose levels of 6.25 and 12.5 mg./kg./day, respectively.

Example 104 N,N'-bis(dichloroacetyl)-1,8-octanediamine was prepared following the procedure described in Example 76 using 3.0 g. of 1,8-octanediamine, 1.9 g. of sodium hydroxide, 50 cc. of water, 50 cc. of ethylene dichloride, and 6.13 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained 3.9 g. of N,N-bis(dichloroacetyl)1,8-octanediamine, M.P. 122.4-123.6 C. (corn), when recrystallized from chloroform.

Analysis.Calcd. for C H C1 N O C1, 38.74; N, 7.64. Found: C1, 38.50; N, 7.56.

Example 105 N,N'-bis(dichloroacetyl)-1,9-nonanediamine was prepared following the procedure described in Example 76 using 8.0 g. of 1,9-nonanediamine dihydrochloride, 4.17 g. of sodium hydroxide, 50 cc. of water, 50 cc. of ethylene dichloride, and 10.2 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained 4.4 g. of N,N'-bis(dichloroacetyl)-1,9-nonanediamine, M.P. 81.2-84.0" C. (corn), after three recrystallizations from benzene.

Analysis.Calcd. for C H C1 N O C1, 37.30; N, 7.36. Found: C1, 37.20; N, 7.38.

The intermediate 1,9-nonanediamine dihydrochloride was prepared following the procedure described in Example 91 for the preparation of N,N'-diethyl-3-methyl- 1,6-hexanediamine using 15.5 g. of 1,9-nonanediamide (i.e., 1,7-dicarbamylheptane), 12.5 g. of lithium aluminum hydride, 100 cc. of tetrahydrofuran and 500 cc. of absolute ether. There was thus obtained 8.0 g. of 1,9- nonanediamine dihydrochloride which was used in the above preparation without further purification.

Example 106 N,N'-bis(dichloroacetyl)1,10-decanediamine was prepared following the procedure described in Example 76 using 8.6 g. of 1,10-decanediamine, 6.0 g. of sodium hydroxide, 50 cc. of water, 50 cc. of ethylene dichloride, and 14.7 g. of dichloroa-cetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained 14.6 g. of N,N-

34 bis(dichloroacetyl)-1,10-decanediamine, M.P. 87.889.8 C. (corn), when recrystallized from isopropyl alcohol.

Analysis.-Calcd. for C14H24C14N2021 C1, N, 7.11. Found: Cl, 36.0; N, 7.07.

N,N'-bis(dichloroacetyl)-1,10-decanediamine when ad ministered orally to hamsters infected with Endamoeba criceti was found to clear none out of 5 and 4 out of 5 0f the animals at dose levels of 25 and 50 mg./kg./day, respectively.

Example 107 N,N'-bis(2,2-dichloropropanoyl) 1,6 hexanediamine was prepared following the procedure described in Example 76 using 2.7 g. of 1,6-hexanediamine, 2.0 g. of sodium hydroxide, 50 cc. of water, 50 cc. of ethylene dichloride, and 7.7 g. of 2,2-dichloropropanoyl chloride in 50 cc. of ethylene dichloride. There was thus obtained 4.9 g. of N,N-bis(2,2-dichloropropanoyl)-l,6-hexanediamine, M.P. 105.2113.6 C. (corn), after recrystallization from isopropyl alcohol.

Analysis.-Calcd. for C H C1 N O Cl, N, 7.65. Found: Cl, 38.40; N, 7.71.

Example 108 N,N bis(dichloroacetyl) N propargyl 1,6 hexanediamine was prepared following the procedure described in Example 76 using 7.7 g. of N-propargyl-1,6- hexanediamine, about 8 g. of sodium hydroxide, about 200 cc. of water, 100- cc. of ethylene dichloride, and 21.6 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained, as a viscous yellow oil, 14.0 g. of N,N bis(dichloroacetyl) N propargyl 1,6- hexarrediamine.

Analysis-Called. for C H Cl N O Cl, 37.72; N, 7.45. Found: Cl, 37.80; N, 7.23.

The intermediate N-propargyl-1,6-hexanediamine was prepared as follows: To 500 g. of 70% aqueous 1,6-hexanediamine solution was added dropwise with stirring 59.5 g. of propargyl bromide, the addition taking about one hour. The reaction mixture was stirred for an additional two hours and then allowed to stand for two days. The mixture was concentrated in vacuo to about two-thirds of its initial volume and poured into two liters of ether. The mixture was filtered; and the filtrate was made basic with 35% aqueous sodium hydroxide solution and extracted with n-butanol. The butanol solution was concentrated, ether added, the mixture filtered, and the filtrate first concentrated in vacuo and then distilled in vacuo to first remove the excess 1, 6-hexanediamine, B.P. -115 C. at 12 mm. and then to yield 49.2 g. of the desired N- propargyl-1,6-hexanediamine, B.P. 121123 C. at 12 mm., n =1.4732.

Analysis.-Calcd. for C H N N, 18.16. Found: N, 18.06.

N-propargyl-l,6-hexanediamine dihydrochloride melted at 196197 C.

Example 109 2 chloro N,N' bis (dichloroacctyl) N,N' diethyl- 1, 4 bis(amin0methyl)benzene was prepared following the procedure described in Example 26B using 6 g. of 2- chloro 1,4 bis(ethylaminomethyl)benzene dihydrochloride, 3.5 g. of sodium hydroxide, 75 cc. of water, about cc. of ethylene dichloride, and 6.5 g. of dichloroacetyl chloride in about 10 cc. of ethylene dichloride. There was thus obtained 7.5 g. of 2 chloro N,N bis(dichlo- .roacetyl) N,N' diethyl 1,4 bis(aminOmethy1)benzene, M.P. 90.2-92.9 C. (corn), when recrystallized from isopropyl alcohol.

.Analysis.--Calcd. for C H Cl N 0 Cl, 39.52; N, 6.24. Found: Cl, 39.30; N, 6.12.

The intermediate 2 chloro 1,4 bis (ethylaminomethyl) benzene as its dihydrochloride was prepared as follows: A mixture containing 14 g. of chloro-para-xylene (2 chloro 1,4 dimethylbenzene), 30 g. (19 cc.) of sulfuryl chloride and mg. of benzoyl peroxide was refluxed on a steam bath for one hour under an efiicient 35 condenser. The reaction mixture was then concentrated in vacuo to yield 2 chloro 1,4 bis(chloromethyl)- benzene which was then treated with 140 g. of 70% aqueous ethylamine and the resulting mixture was stirred at room temperature overnight. The reaction mixture was then concentrated in vacuo to yield a crystalline material which was recrystallized from absolute ethanol to yield 7 g. of 2 chloro 1,4 bis(ethylaminomethyl)benzene dihydrochloride, M.P. 300 C.

Analysis.-Calcd. for C C ClN-2HCl: Cl-, 23.62. Found: Cl 23.23.

2 chloro N,N bis(dichloroacetyl) N,N' diethyl- 1,4 bis(aminomethyl)benzene when administered orally to hamsters infected with Endamoeba criceti was found to have an ED of 0.47:0.14 mg./kg./day. This compound was found to have an approximate acute oral toxicity (ALD in mice of greater than 4,000 mg/kg.

Example 110 2 chloro N,N' bis(dibromoacetyl) N,N' diethyl- 1,4 bisaminomethyl)benzene was prepared following the procedure described in Example 26B using 6.0 g. of 2 chloro 1,4 bis (ethylaminomethyl)benzene dihydrochloride, 4.0 g. of sodium hydroxide, 50 cc. of water, 50 C0. of ethylene dichloride, and 9.5 g. of dibromoacetyl bromide in 50 cc. of ethylene dichloride. There was thus obtained 3.3 g. of 2 chloro N,N' bis(dibromoacetyl)- N,N diethyl 1,4 'bis(aminomethyl)benzene, M.P. 115.2-122.4 C. (corn), when crystallized from ethanol and recrystallized once from ethanol-ether and once from is'opropyl alcohol.

Analysis.Calcd. for C H Br ClN O C, 30.70; H, 3.06.; Br, 51.03; N, 4.47. Found: C, 30.78; H, 3.40; Br, 52.12; N, 4.45.

2 chloro N,N bis(dibromoacetyl) N,N' diethyl- 1,4 bis(aminomethyl)benzene when administered orally to hamsters infected with Endamoeba crz'cezi was found to clear 8 out of 9 and 4 out of 4 of the animals at dose levels of 1.56 and 3.12 mg./kg./ day, respectively.

Example 111 N,N bis(dichloroacetyl) N,N' diethyl 2,3,5,6- tetramethyl 1,4 bis(aminomethyl) benzene was prepared following the procedure described in Example 26B using 10 g. of 1,4 bis(ethylaminomethyl) 2,3,5,6 tetramethylbenzene, 3.5 g. of sodium hydroxide, 75 cc. of water, about 100 cc. of ethylene dichloride, and 12 g. of dichloroacetyl chloride in about 20 cc. of ethylene dichloride. Since the product did not recrystallize readily from the usual solvents, it was washed in hot ethanol, the ethanol mixture was chilled, and the crystalline product was collected and dried to yield 12.6 g. of N,N' bis(dichloroacetyl) N,N' diethyl 2,3,5,6 tetramethyl 1,4 bis (aminomethyDbenzene, M.P. 190.6-194.6 C. (corr.).

Analysis.Calcd. for C H Cl N O Cl, 30.14; N, 5.95. Found: Cl, 30.54; N, 5.84.

The intermediate 1,4 bis(ethylaminomethyl) 2,3,5,6- tetramethylbenzene was prepared by warming a mixture of 23.1 g. of 1,4 bis(chloromethyl) 2,3,5,6 tetramethylbenzene [i.e., =bis(chloromethyl)durene] and 140 g. of 70% aqueous ethylamine solution until dissolution was elfected. The solution was then stirred overnight and the precipitate that separated was collected and dried in vacuo to yield 27.3 g. of 1,4 bis(ethylaminomethyl) 2,3,5,6- tetramethylbenzene, M.P. 7071 C.

N,N bis(dichloroacetyl) N,N' diethyl 2,3,5,6- tetramethyl 1,4 bis(aminomethyl)benzene when adminstered orally to hamsters infected with Endamoeba criceti was found to clear 1 out of 5, 2 out of 5 and 2 out of 5 of the animals at dose levels of 25, 50 and 100 mg./ kg./ day, respectively.

Example 112 N,N bis(dichloroacetyl) N,N diethyl 1,3 bis (aminomethyl)benzene was prepared following the procedure described in Example 26B using 13.5 g. of 1,3- bis(ethylaminomethyl)benzene dihydrochloride, 8.5 g. of sodium hydroxide, 50 cc. of Water, 100 cc. of ethylene dichloride, and 16.6 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained, as a pale yellow viscous oil, 18.2 g. of N,N'-'bis(dichloroacetyl) -N,N'-diethyl-1,3-'bis( aminomethyl) benzene after drying at 0.2 mm. with warming.

Analysis.-Ca1cd. for C H Cl N O Cl, 34:23; N, 6.77. Found: Cl, 34.72; N, 6.44.

The intermediate 1,3-bis(ethylaminomethyl)benzene as its dihydrochloride was prepared following the procedure described in Example 26A using 11 g. of isophth-alaldehyde, and 65 g. of 70% aqueous ethylamine to form the bis-anil which was then hydrogenated using cc. of ethanol and 300 mg. of PdCl on 2 g. of charcoal at 30 C. and about 30-40 lbs. per sq. inch of hydrogen. The hydrogenation took about 2 hours. There was thus obtained 14 g. of 1,3-bis(ethylaminomethyl)benzene dihydrochloride, M.P. 2122l3 C.

Analysis.Calcd. for C H 'N lHClz Cl 26.74. Found: Cl, 26.72.

N,N' bis(dichloroacetyl) N,N' diethyl 1,3 bis (aminomethyl)benzene when administered orally to hamsters infected with Endamoeba criceti was found to clear none out of 5 and 5 out of 5 of the animals at dose levels of 25 and mg./kg./ day, respectively.

Example 113 N,N bis(dichloroacetyl) N,N diethyl 1,4 bis (aminomethyl)naphthalene was prepared following the procedure described in Example 26B using 24 g. of N,N- diethyl-1,4-bis(aminomethyl)naphthalene, 250 cc. of 1 N aqueous sodium hydroxide solution, 200 cc. of ethylene dichloride, and 32.3 g. of dichloroacetyl chloride in 70 cc. of ethylene dichloride. There was thus obtained 7 g. of N,N-bis(dichloroacetyl)-N,N-diethyl-1,4-bis(aminomethyl)naphthalene, M.P. 140.2-157.2 C. (corn), after an initial purification chromatographically on a silica column with acetone-pentane (1:5) solvent and three recrystallizations from isopropyl alcohol.

Allllb'lS-CfllCd. for C H Cl N O C, H, 4.78; N, 6.04. Found: C, 51.83; H, 4.73; N, 5.95. i

The intermediate N,N-diethyl-1,4-bis (aminomethyl naphthalene was prepared by stirring a mixture of 22.5 g. of 1,4-bis(chloromethyl)naphthalene and 130 cc. of 70% aqueous ethylamine for about two hours. The reaction mixture was then allowed to stand overnight, treated with excess 35% aqueous sodium hydroxide solution and extracted with benzene. The benzene extract was washed with water, dried and distilled in vacuo to yield, as an oil, 24 g. of N,N-diethyl-1,4-bis(aminomethyl)naphthalene.

N,N' bis(dichloroacetyl) N,N' diethyl 1,4 'bis (aminomethyl)naphthalene when administered orally to hamsters infected with Endamoeba criceti was found to clear none out of 5 and 5 out of 5 of the animals at dose levels of 25 and 50 mg./kg./day, respectively.

Example 114 N,N' bis(dichloroacetyl) N,N' bis(2 dihydroxyethyl) 1,4 bis(aminomethyl)naphthalene was prepared following the procedure described in Example 1B using 5 g. of N,N-bis(2-hydroxyethyl)-1,4-bis(aminomethyl) naphthalene and 5.7 g. of methyl dichloroacetate. There was thus obtained 4 g. of N,N-bis(dichloroacetyl)-N,N'- bis(2 dihydroxyethyl) 1,4 bis(aminomethyl)naphthalene, M.P. 180.2183.2 C. (corr.).

Analysis.CalCd. for C20H22C14N204I Cl, O, 12.90. Found: Cl, 28.04; 0, 13.15.

The intermediate N,N' bis(2 hydroxyethyl) 1,4- bis(aminomethyl)naphthalene was prepared by mixing 11.2 g. of 1,4-bis(chloromethyl)naphthalene and g. of Z-hydroxyethylamine. The reaction was exothermic with a maximum temperature of C. being reached after about ten minutes, at Which time dissolution had been completed. The reaction mixture was allowed to stand overnight and then poured into one liter of water. The aqueous mixture was then made basic with excess 35% aqueous sodium hydroxide solution and extracted first with ethylene dichloride and then with chloroform. The extracts were evaporated in vacuo; and the respective white solids were combined and recrystallized from benzene to yield 5 g. of the product. A sample was recrystallized for analysis, M.P. 128.5130.5 C. (corr.).

Analysis.Calcd. for C l-1 N N, 10.20. Found: N, 10.02.

N,N' bis(dichloroacetyl) N,N' bis(2 dihydroxyethyl) 1,4 bis(aminomethyl)naphthalene when administered orally to hamsters infected with Endamoeba criceti was found to clear 1 out of 4 of the animals at a dose level of 100 mg./ kg./ day.

Example 115 N,N' bis(dichloroacetyl) N,N' bis(2 methoxyethyl) 1,4 bis(aminomethyl)naphthalene was prepared following the procedure described in Example 47B using 30 g. of N,N bis(Z-methoxyethyl)-1,4-bis(aminomethyl) naphthalene, 250 cc. of 1 N sodium hydroxide solution, 250 cc. of ethylene dichloride, and 32.5 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained 9 g. of N,N-bis(dichloroacetyl)-N,N'-bis (2 methoxyethyl) 1,4 bis(aminornethyl)naphthalene, M.P. 147.2-149.6 C. (corr.), after two recrystallizations from benzene and one from ethanol.

Analysis.Calcd. for C H Cl N O C1, N, 5.34. Found: Cl, 27.16; N, 5.34.

The intermediate N,N bis(2 methoxyethyl) 1,4- bis(aminomethyl)naphthalene was prepared following the procedure described in Example 116 for the preparation of the corresponding N,N'-bis(2-hydroxyethyl) compound using 22.5 g. of 1,4-bis(chloromethyl)naphthalene and 200 cc. of 65% aqueous Z-methoxyethylamine solution. There was thus obtained, as an oil, 30 g. of the intermediate.

N,N' bis(dichloroacetyl) N,N bis(2 methoxyethyl) 1,4 bis(aminomethyl)naphthalene when administered orally to hamsters infected with Endamoeba criceti was found to clear none out of 5 and 5 out of 5 of the animals at dose levels of 50 and 100 mg./kg./day, respectively.

Example 116 N,N bis(dichloroacetyl)-N,N'-bis(2-formyloxyethyl)- 1,4-bis(aminomethyDnaphthalene was prepared following the procedure described in Example 66 using 20 g. of N,N' bis(dichloroacetyl)-N,N'-bis(2hydroxyethyl)-1,4 bis(aminornethyl)naphthalene and 200 cc. of formic acid. The resulting product, N,N'-bis(dichloroacetyl)-N,N- bis (Z-formyloxyethyl 1 ,4-bis aminomethyl naphthalene, melted at 146.0-149.4 C. (corn).

Analysis.-Calcd. fOr C22H22C14N206: C1, Found: Cl, 25.52.

N,N' bis(dichloroacetyl)-N,N'-bis(2-formyloxyethyl) 1,4 bis(aminomethyl)naphthalene when administered orally to hamsters infected with Endamoeba criceti was found to clear none out of 5 and 3 out of 5 of the animals at dose levels of 12.5 and 25 mg./kg./day, respectively.

Example 117 N,N' bis(dichloroacetyl) N,N-bis(2-hydroxyethyl)- 9,10-bis(aminomethyl)anthracene was prepared following the procedure described in Example 1B using 6.5 g. of N,N bis(2-hydroxyethyl) -9,10-bis(aminomethyl) anthracene and 7.2 g. of methyldichloroacetate. There was thus obtained 4.5 g. of N,N'-bis(dichloroacetyl)-N,N-bis(2- hydroxyethyl) 9,10-bis(aminomethyl)anthracene, M.P. 215216 C. (corn) with decomposition.

Analysis.-Calcd. for C H CI N O Cl, 25.94; N, 5.13. Found Cl, 26.08; N, 5.14.

The intermediate N,N-bis(2-hydroxyethyl)-9,10-bis (aminomethyDanthracene was prepared by heating on a steam bath for about six hours a stirred mixture containing 27.5 g. of 9,10-bis(chloromethyl)anthracene, 122 g. of 2-hydroxyethylamine and 50 cc. of dimethylformamide. The reaction mixture was allowed to stand at room temperature over the weekend. The solid that had separated was collected and dissolved in 1 N aqueous HCl solution. The acidic solution was treated with decolorizing charcoal, filtered, extracted successively with ethylene dichloride and benzene, and then made basic With 35% aqueous NaOH solution. The resulting precipitate was collected, washed with water and recrystallized from ethanol to yield 12 g. of N,N'-bis(2-hydroxyethyl)-9,10- bis(aminomethyl)anthracene, M.P. 165-175 C.

N,N bis(dichloroacetyl)-N,N'-bis(2-hydroxyethyl)-9, l0-bis(aminomethyl)anthracene when administered orally to hamsters infected with Endamoeba criceti was found to clear none out of 5 and 2 out of 5 of the animals at dose levels of 100 and 200 mg./kg./day, respectively.

Example 118 N,N' diisopropyl N,N-bis(trichloroacetyl)-2,6-bis (aminomethyl)pyridine was prepared following the procedure described in Example 26B using 5.5 g. of N,N- diisopropyl 2,6-bis(aminomethyl)pyridine dihydrochloride, 3.04 g. of sodium hydroxide, 50 cc. of water, 50 cc. of ethylene dichloride, and 6.9 g. of trichloroacetyl chloride in 50 cc. of ethylene dichloride. There was thus obtained 2.4 g. of N,N'-diisopropyl-N,N'-bis(trichloroacetyl)-2,6-bis(aminomethyl)pyridine, M.P. 134.2135.6 C. (corr.), after two recrystallizations from absolute ethanol and three recrystallizations from isopropyl alcohol, followed by drying at 1 mm. and C. for about eighteen hours.

Analysis.Calcd. for C H Cl N O C1, NAP 2.73. Found: Cl, 41.06, 40.84; N 2.73.

The intermediate N,N'-diisopropyl-2,6-bis(aminomethy1)-pyridine was prepared following the procedure described in Example 26A using 13.5 g. of pyridine-2,6- dicarboxaldehyde, 12 g. of isopropylamine and cc. of absolute ethanol to form the bis-anil which was catalytically hydrogenated using PdCl on charcoal at room temperature. There was thus obtained 24 g. of N,N' diisopropyl-2,6-bis(aminomethyl)pyridine dihydrochloride, M.P. 245246 C.

N,N diisopropyl N,N' bis(trichloroacetyl)-2,6-bis (aminomethyl) pyridine when administered orally to hamsters infected with Endamoeba criceti was found to clear 1 out of 5 and 3 out of 5 of the animals at dose levels of 50 and 100 mg./kg./day, respectively.

Example 119 N,N-bis(dichloroa-cetyl) -N,N'-diethyl-1,4-bis(2-aminoethyl)-benzene was prepared following the procedure described in Example 26B using 5.8 g. of N,N-diethyl-l,4- bis(2-aminoethyl)-benzene, 2.4 g. of sodium hydroxide, 200 cc. of water, 100 cc. of ethylene dichloride, and 7.7 g. of dichloroacetyl chloride in about 50 cc. of ethylene dichloride. There was thus obtained, as a viscous yellow oil, 9.0 g. of N,N-bis(dichloroacetyl)-N,N'-diethyl-1,4- bis(2-aminoethyl)benzene.

Analysis.Calcd. for C H Cl N O Cl, 32.08; N, 6.34. Found: Cl, 31.50;N, 6.38.

The intermediate N,N'-diethyl-l,4-bis(2-aminoethyl)- benzene was prepared as follows: 1,4-bis(cyanomethyl) benzene (15.6 g.) was dissolved in 100 cc. of acetic anhydride and was catalytically hydrogenated using 1.5 g. of platinum oxide to yield 16.4 g. of N,N-diacetyl-l,4- bis(2-aminoethyl)benzene, M.P. 209213 C., after recrystallization from ethanol. To a stirred suspension containing 5.7 g. of lithium aluminum hydride in 200 cc. of tetrahydrofuran was added portionwise 16.4 g. of N,N'- diacetyl-1,4- bis(2-aminoethyl)benzene and the resulting mixture was stirred under reflux for about six hours. The reaction mixture was cooled and, While stirring, was treated succesively with 6 cc. of water, 4.5 cc. of 20% aqueous sodium hydroxide solution and 21 cc. of water. The reaction mixture was filtered; the filtrate was concentrated in vacuo to remove the solvent; and the resulting Example 120 N,N bis(dichloroacetyl) N,N'-4-aminobenzylamine was prepared following the procedure described in Example 263 using 5.8 g. of N,N-diethyl-4-aminobenzylamine, 3.0 g. of sodium hydroxide, 200 cc. of water, 100 cc. of ethylene dichloride and 9.6 g. of dichloroacetyl chloride. There was thus obtained 6.5 g. of N,N'-bis(dichloroacetyl) N,N diethyl-4-aminobenzylamine, M.P. 96.4.98.8 C. (corr.), when crystallized from cyclohexane and recrystallized from isopropyl alcohol-water.

Analysis.Calcd. for C H Cl N O Cl, 35.45; N, 7.00. Found: Cl, 35.20; N, 6.88.

The intermediate N,N'-diethyl-4-aminobenzylamiue was prepared as follows: To a stirred suspension of 4.4 g. of lithium aluminum hydride in 100 cc. of tetrahydrofuran was added portionwise 11.0 g. of N-ethyl-4-(acetamido) benzamide. The mixture was then refluxed for five hours and allowed to stand overnight. Then there were successively added dropwise with stirring 4.4 cc. of Water, 3.3 cc. of 20% aqueous sodium hydroxide solution and 15 cc. of water. The reaction mixture was filtered and the granular precipitate was washed with benzene. The combined filtrate and benzene washings were concentrated in vacuo to remove the solvent and the residual oil was distilled in vacuo yielding, as a yellow oil, 60 g. of N,N'-diethy1-4-aminobenzylamine, B.P. 94-975 C. at 0.1 mm, n =1.5488.

The N-ethyl-4-(acetamido) benzamide was prepared by catalytically hydrogenating N-ethyl-4-nit-robenzamide (35 g.) dissolved in 50 cc. of acetic anhydride and 50 cc. of dimethylformamide using 0.5 g. of platinum oxide. After the hydrogenation had been completed, the catalyst was filtered off, the filtrate was concentrated in vacuo to remove the solvent, and the residual material was triturated with ethyl acetate. The ethyl acetate mixture was filtered to yield 11.0 g. of N-ethyl-4-(acetamido)benzamide, M.P. 215-223 C.

N,N-bis(dichloroacetyl) N,N' dimethyl 4 aminobenzylamine when administered orally to hamsters infected with Endamoeba oriceti was found to clear 2 out of and 5 out of 5 of the animals at dose levels of 12.5 and 25 mg./kg./ day, respectively.

Example 121 N,N'-bi-s(dichloroacetyl) -N,N-diethyl-2,4-dimethyl-1,5- bis(aminomethyl)benzene was prepared as follows: To 16.4 g. of 2,4-dimethyl-l,5-bis(aminomethyl) benzene was added 50 cc. of acetic anhydride. The reaction mixture was cooled in ice and 100 cc. of chloroform was added. The resulting precipitate was collected, washed with chloroform and air-dried to yield 23.5 g. of N,N'-diacetyl- Z,4-dimethyl-1,5-bis(aminomethyl)benzene, M.P. 253- 255 C.

To a stirred suspension containing 9.1 g. of lithium aluminum hydride in 300 cc. of tetrahydrofuran was added portionwise 20 g. of N,N-diacetyl-2,4-dimethyl-1,5-bis- (aminomethyl)benzene. The resulting mixture was reiuxed with stirring for 16 hours, cooled and worked up following the procedure described in Example 121 for the preparation of N,N'-diethyl-1,4-bis(2-aminomethyl)- Jenzene to yield, as a light brown oil, N,N'-diethyl-2,4- iimethyl-1,5-bis(aminomethyl)benzene. This compound was then reacted with 23.6 g. of dichloroacetyl chloride following the procedure described in Example 2613 using 5.4 g. of sodium hydroxide, 100 cc. of water and a total of about cc. of ethylene dichloride. There was thus obtained 4.5 g. of N,N'-bis(dichloroacetyl)-N,N'-diethyl- 2,4-dimethyl-1,5-bis(aminomethyl)benzene, M.P. 96.8 100.0 C. (corn), after recrystallization from cyclohexane.

Analysis.Calcd. for C H Cl N O C1, N, 6.34. Found: Cl, 32.05; N, 6.37.

Example 122 N,N-bis(dichloroacetyl)-N,N-diethyl-2,5-dimethyl-1,4- bis(aminomethyl)benzene was prepared following the procedure described in Example 26B using 7.0 g. of N,N'- diethyl-2,5-dimethyl-1,4-bit aminomethy1)benzene dihydrochloride, 4.4 g. of sodium hydroxide, 50 cc. of water, 100 cc. of ethylene dichloride, and 7.9 g. of dichloroacetyl chloride in 20 cc. of ethylene dichloride. There was thus obtained 7.5 g. of N,N'-bis(dichloroacetyl)-N,- N-diethyl-2,5-dimethyl 1,4 bis(aminomethyl)benzene, M.P. l77.0180.0 C. (corn), when recrystallized from ethylene dichloride.

AllZlYSlS.-C&1Cd. for C 3H24c14N2O2I Cl, N, 6.34. Found: Cl, 32.05; N, 6.33.

The intermediate N,N'-diethyl-2,5-dimethyl-1,4-bis- (aminomethyl)benzene was prepared following the procedure described in Example 116 for the preparation of N,N-diethyl-1,4-bis(aminomethyl)naphthalene using 10.0 g. of 2,5-dimethyl-l,4-bis(chloromethyl)benzene and 100 cc. of 70% aqueous ethylamine solution. There was thus obtained 9.0 g. of the intermediate as its dihydrochloride, M.P. 300 C.

Example 123 N,N'-bis(dichloroacetyl) 1,4 'bis(aminomethyl)cyclohexane was prepared as follows: To 14.2 g. of 1,4-bis- (aminomethyl)cyclohexane was added 28.6 g. of methyl dichloroacetate. The reaction mixture which became very warm was allowed to cool and then stand at room temperature whereupon a White crystalline solid separated. The solid was collected and recrystallized from dimethylformamide using decolorizing charcoal to yield 13.7 g. of N,N'-bis (dichloroacetyl) -1,4-bis (aminomethyl) cyclohexane, M.P. 239.4241.4 C. (corn), with decomposition.

AnalySis.-Calcd. for C12H1 C14N2O2i Cl, N, 7.69. Found: Cl, 38.80; N, 7.94.

N,N'-bis(dichloroacetyl) 1,4 bis(aminomethyl)cycl0- hexane when administered orally to hamsters infected with Endamoeba criceti was found to clear none out of 5 and 4 out of 5 of the animals at dose levels of 25 and 50 mg./kg./day, respectively.

Example 124 N,N'-bis(dichloroacetyl) N,N' diethyl-trans-1,4-bis- (aminomethyl)cyclohexane was prepared following the procedure described in Example 26B using 12.5 g. of N,N-diethyl-traus-1,4-bis(aminomethyl) cyclohexane, 8.1 g. of sodium hydroxide, 100 cc. of water, 100 cc. of ethylene dichloride, and 15 g. of dichloroacetyl chloride in 50 cc. of ethylene dichloride. The solid product that was obtained was suspended in ethanol and the ethanol mixture boiled. The mixture was chilled and filtered to yield 14 g. of N,N-bis(dichloroacetyl)-N,N'-diethyl-trans-1,4- bis(aminomethyl)cyclo-hexane, M.P. 179.2181.4 C. (corn).

Analysis.-Cal.cd. for C1 H Cl4N2O2I Cl, N, 6.67. Found: 33.25; N, 6.70.

The intermediate N,N-diethyl-trans 1,4 bis(aminomethyl)cyclohexane was prepared as follows: To a stirred mixture containing 15.3 g. of lithium aluminium hydride and 400 cc. of ether was added in small portions 20 g. of N,N'-diacetyl-trans-1,4-bis (amino-methyl) cyclohexane. About 40 cc. of tetrahydrofuran was added and the reaction mixture was then stirred rapidly at reflux for about six hours. The stirred reaction mixture was then treated successively and gradually with 16 cc. of water, 16 cc. of 

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